Linda has a shelf that is 56 over 5 inches wide. How many catalogs can Linda arrange on the shelf if each catalog is 4 over 5 of an inch thick?

Linda Has A Shelf That Is 56 Over 5 Inches Wide. How Many Catalogs Can Linda Arrange On The Shelf If

Answers

Answer 1

Answer:

Last option: 31

Step-by-step explanation:

No. of catalogs that can be arranged

= (longest side of shelf ÷ longest side of catalog) × (shortest side of shelf ÷ shortest side of catalog)

= (56 ÷ 5) × (5 ÷ 4)

= 31


Related Questions

pls help asap giving 50 points Farmer A planted green beans and corn at a ratio of 5:3. Farmer B planted green beans and corn at a ratio of 3:2.

Which farmer planted a greater ratio of green beans to corn?

Answers

Farmer A planted a greater ratio of green beans to corn

How to find the farmer that planted a greater ratio of green beans to corn?

Ratio is defined as the comparison of two quantities (a and b) of the same units which indicates how much of one quantity is present in the other quantity. They are written a / b, where b does not equal 0

Given that:  Farmer A planted green beans and corn at a ratio of 5:3 and farmer B planted green beans and corn at a ratio of 3:2

To find the greater ratio treat the ratio as a fraction:

Farmer A => 5:3  and Farmer B => 3:2

5/3  and  3/2      (LCM of 2 and 3 is 6)

10/6 and 9/6

10:6 and 9:6

Since 10:6 is greater than 9:6. Therefore, Farmer A planted a greater ratio of green beans to corn

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quick help me please

Answers

Answer:

calculate the difference ere

(3-22)+5

remove unnecessary parentheses

-19+5

calculate the sum

= -14

How to solve step by step

Answers

Answer: 5

Step-by-step explanation: First we do (-4-(-7))^2 which is 9 and then

(8-4)^2 which is 16 so 9+16=25 and √25 = 5.

which polynomial function has a leading coefficient of 1 and roots (7+i) and (5-i) with multiplicity 1?

Answers

The polynomial function which has a leading coefficient 1 is (x-(7+i))(x-(5-i))(x-(7-i))(x-(5+i))

Given that a polynomial function has leading coefficient 1 and roots (7+i) and (5-i) with multiplicity 1.

We want to find the polynomial function.

As we know that the complex conjugate properties of the roots of a polynomial states that if a+bi is a root of a polynomial then their complex conjugate a-bi is also a root.

So, according to this property (7-i) and (5+i) with multiplicity 1 is also a root of polynomial.

Thus, all the roots are x=7+i, x=7-i, x=5+i and x=5-i

So, the polynomial is f(x)=(x-(7+i))(x-(5-i))(x-(7-i))(x-(5+i))

Hence, the polynomial function which has a leading coefficient 1 and roots (7+i) and (5-i) is (x-(7+i))(x-(5-i))(x-(7-i))(x-(5+i)).

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angela is following this recipe to make biscuits. angela uses 3.3 litres of syrup. how much sugar is needed in kg

Answers

The quantity of sugar that is needed in kg would be = 1.8kg

What is recipe?

Recipe is defined as the list of components of ingredients that makes up a food product.

From the recipe given by Angela, the quantity of syrup that is used to make up to 14 biscuits= 275 ml.

The quantity of sugar that is used to make up to 14 biscuits= 150g

Therefore the quantity of sugar that would be used for syrup of 3.3 liters would be= X

That is;

275ml = 150g

3.3L = X

Convert 3.3L to ml = 3,300ml , then make x the subject of formula;

X = 3300×150/275

X = 495000/275

X= 1,800g

Then convert 1,800g to kg by dividing through with 1000;

1800/1000 = 1.8 kg

Therefore, the quantity of sugar that would be used for 3.3L of syrup would be 1.8kg.

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Complete question:

Angela is following this recipe to make biscuits.Angela uses 3.3 litres of syrup.

How much margarine is needed in kg?

Recipe: Makes 14 biscuits

120 g margarine

150 g sugar

275 ml syrup

200 g oats

60 g sultanas

How much sugar is needed in kg?

How do you find the distance between the points shown? (C: 6, -4) and (D: 6, -8)

A. Subtract the distance between each point and the x-axis
B. Add the distance between each point and the x-axis
C. Subtract the distance between each point and the y-axis
D. Add the distance between each point and the y-axis

Answers

Answer:

A. Subtract the distance between each point and the x-axis.

Step-by-step explanation:

As the two points have the same x-coordinate, x = 6, it means they lie on the vertical line x = 6.

Therefore, the distance between the points can be found by subtracting the distance between each point and the x-axis.

In the given example, the points are C(6, -4) and D(6, -8).

To find the distance between a point and the x-axis, we simply take the absolute value of the y-coordinate of the point:

Distance between point C and the x-axis = |-4| = 4

Distance between point D and the x-axis = |-8| = 8

Subtracting the distances, we get:

Distance = 8 - 4

Distance = 4

Therefore, the distance between points C and D is 4 units.

What is the equation in point-slope form of a line that passes through the point (6,5) and has a slope of 1? Convert to slope-intercept

Answers

Answer:

Point-slope: y-5=x-6

Slope intercept: y=x-1

Step-by-step explanation:

y-y1=m(x-x1) Point slope form

y-5=1(x-6)

y-5=x-6

y=x-1

A line is drawn through (–7, 11) and (8, –9). The equation y – 11 = y minus 11 equals StartFraction negative 4 Over 3 EndFraction left-parenthesis x plus 7 right-parenthesis.(x + 7) is written to represent the line. Which equations also represent the line? Check all that apply.

y = y equals StartFraction negative 4 Over 3 EndFraction left-parenthesis x plus StartFraction 5 Over 3 EndFraction.x +
3y = –4x + 40
4x + y = 21
4x + 3y = 5
–4x + 3y = 17

Answers

The equivalent linear equation in standard form is 4x + 3y = 5

How to determine the equivalent equations?

From the question, we have the following parameters that can be used in our computation:

Points = (-7, 11) and (8, –9)

Point-slope form is y - 11 = -4/3(x + 7).

Recall that the point-slope form is y - 11 = -4/3(x + 7).

So, we have

y - 11 = -4/3(x + 7).

Multiply through both sides by 3

This gives

3y - 33 = -4(x + 7).

Open the brackets

3y - 33 = -4x - 28

Evaluate the like terms

3y = -4x +  5

Add 4x to both sides

4x + 3y = 5

Hence, the equation is 4x + 3y = 5

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how many movies did marc watch between the beginning of week 1 and the beginning of week 5? do not include the unit in your answer.

Answers

Using the concepts of straight line, we got 7 movies did marc watch between the beginning of week 1 and the beginning of week 5.

From the diagram given, we got that during the week 1 number of movies watch by marc is 2,while at the beginning of the week 5 the number of movies watch by marc is 9.

So, we need total  number of movies watched by marc in between week 1 and week 9 which is given by-

Number of movies watch at the beginning of week 5-Number of movies watch at the beginning of week 1

Number of movies=9-2

=>Number of movies watched by marc=7.

Hence, the number of movies marc watch between the beginning of week 1 and the beginning of week 5 is 7.

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(Complete question)

Marc is keeping track of the total number of movies he has watched over time. The line graph below actually shows the data where the number of movies corresponds to  number of movies that had been watched at the beginning of  week shown on the horizontal axis.

How many movies did Marc watch between  beginning of week 1 and the beginning of week 5? Do not include the unit in your answer.

a square tile is expanding as it is heated. right now, the 29 cm tile is growing by 1.625 cm per hour. at what rate is the area of the tile changing?

Answers

Using the concept of application of derivative it is concluded that the rate of change in the area of square tile is 94.25 cm²/hour.

What is the area of a square?

The area of the square is defined as the square of its sides.

Let the side of the square is a then its area will be a².

Area of square figure = Side².

Let the side of the square is x= 29cm.

It is given that the side 29 cm tile is growing by 1.625 cm per hour on heating.

And the rate of change in side of square dx/dt = 1.625 cm/hour

We have to calculate the rate of change in an area of the square (A).

hen, area A = x²

On differentiating A with respect to time(t) we get a rate of change in area

dA/dt = d(x²)/dt

= 2x dx/dt

= 2×29×1.625

= 94.25 cm²/hour

Hence, the rate of change in the area of the square tile is 94.25 cm²/hour.

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the breaking strengths of a random sample of 20 bundles of wool fibers have a sample mean 436.5 and a sample standard deviation 11.9. (a) construct 90%, 95%, and 99% confidence intervals for the average breaking strength of the wool fibers. (b) compare the widths of the three confidence intervals. at which level of confidence do you have the widest interval? (c) do you think it is plausible that the average breaking strength is equal to 450?

Answers

With the help of standard deviation we can conclude our answer.

What is standard deviation?The standard deviation is a statistic that expresses how much variance or dispersion there is in a group of numbers.While a high standard deviation suggests that the values are dispersed over a wider range, a low standard deviation suggests that the values tend to be close to the mean (also known as the anticipated value) of the collection.The lower case Greek letter (sigma), for the population standard deviation, or the Latin symbol s, for the sample standard deviation, are most frequently used in mathematical texts and equations to indicate standard deviation. Standard deviation may be written as SD.

acc to our question-

total sample of wool fibres = 20thus the sample mean = 436.05hence the sd= 11.9

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For what values of x is the absolute value function ƒ(x) = |x + 1| − 3 increasing?

Answers

By identifying the vertex of the function, we conclude that it is increasing for:

x > -1

For what values of x is the function increasing?

Here we have an absolute value function:

f(x) = |x + 1| - 3

This absolute value function has a positive coefficient, which means that the function opens upwards, so it looks like a regular "V" letter.

The function is increasing when, reading from left to right, we see that the line goes upwards. And for functions like this, this happens for values of x larger than the vertex x-value.

For:

f(x) = |x + 1| - 3

The vertex is at (-1, -3)

Then the function is increasing for x > -1

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f(x) = |x|-3; vertical shrink by a factor of 1/3

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An equation that represents a vertical shrinkage of the graph of g(x)=1/3|x|-1 by a factor of three.

What is vertical shrink?A vertical stretch/shrink by a factor of k also means that the point (x, y) on the f (x) graph is transformed to the point (x, ky) on the g graph (x). Vertical Stretches and Shrinks Examples Consider the base functions (1) f (x) = x2 - 2, and (2) g(x) = sin (x). Stretches and shrinks, unlike translations, effectively pull the base graph outward or compress the base graph inward, changing the overall dimensions of the base graph without changing its shape. Multiply or divide the output by a constant to stretch or shrink the graph in the y direction.

Given,

f(x) = |x|-3;

vertical shrink by a factor of = 1/3

Therefore,

g(x)=1/3|x|-1

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kara, who lives in canada, plays a popular online video game where every round has a winner. her best streak is 212121 wins in a row, and she wonders how that compares to other players. the game's website has a worldwide leaderboard of players with the longest win streaks for each month. kara finds that the top 200200200 longest streaks in the world in june had an average of about 636363 wins in a row. for which population is 636363 wins a legitimate estimate of the average longest streak?

Answers

For which population is 636363 wins a legitimate estimate of the average longest streak: Only the top 200200200 longest streaks worldwide in June

Mean = sum of data / Number of data

The 200200200 longest streaks weren't randomly selected from a larger population. They are not representative of all players in the world or Canada, but they are the top 200200200 longest streaks of all players. So,

Only the top 200200200 longest streaks worldwide in June will win.

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I need help with this

Answers

What is the coordinate plane?In order to make it simple to locate the points, a cartesian plane divides the plane space into two dimensions. The coordinate plane is another name for it. The horizontal x-axis and the vertical y-axis are the two axes of the coordinate plane. The origin is the place where these coordinate axes connect, and they divide the plane into four quadrants (0, 0). Additionally, any point in the coordinate plane is denoted by the coordinates (x, y), where x represents the point's position in relation to the x-axis and y represents its position in relation to the y-axisThe origin O is the location where the x- and y-axes intersect, and its coordinates are (0, 0).The positive x-axis is to the right of the origin O, while the negative x-axis is to the left of the origin O. Additionally, the positive and negative y-axes are located above and below the origin O, respectively.The first quadrant's point (x, y) is plotted with reference to the positive x-axis and the positive y-axis because it has both positive values.With reference to the negative x-axis and positive y-axis, the point (-x, y) in the second quadrant is drawn.Plotting is done with reference to the negative x-axis and negative y-axis for the point depicted in the third quadrant (-x, -y).The positive x-axis and the negative y-axis are used to plot the point (x, -y) that is located in the fourth quadrant.

Solution

From given equation

Slope = -2

and y-intercept is (0,0)

Therefore,

if we put x= 0

then y = -2*0 = 0

if we put x = 1

then y = -2*1 = -2

for graph plotting, see the attachment.

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What is the coordinate plane?In order to make it simple to locate the points, a cartesian plane divides the plane space into two dimensions.The coordinate plane is another name for it.The horizontal x-axis and the vertical y-axis are the two axes of the coordinate plane.The origin is the place where these coordinate axes connect, and they divide the plane into four quadrants (0, 0).Additionally, any point in the coordinate plane is denoted by the coordinates (x, y), where x represents the point's position in relation to the x-axis and y represents its position in relation to the y-axisThe origin O is the location where the x- and y-axes intersect, and its coordinates are (0, 0).The positive x-axis is to the right of the origin O, while the negative x-axis is to the left of the origin O. Additionally, the positive and negative y-axes are located above and below the origin O, respectively.The first quadrant's point (x, y) is plotted with reference to the positive x-axis and the positive y-axis because it has both positive values.With reference to the negative x-axis and positive y-axis, the point (-x, y) in the second quadrant is drawn.Plotting is done with reference to the negative x-axis and negative y-axis for the point depicted in the third quadrant (-x, -y).The positive x-axis and the negative y-axis are used to plot the point (x, -y) that is located in the fourth quadrant.

Solution

From given equation

Slope = -2

and y-intercept is (0,0)

Therefore,

if we put x= 0

then y = -2*0 = 0

if we put x = 1

then y = -2*1 = -2

for graph plotting, see the attachment.

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tan 30 x cos 30 in exact value

Answers

90 because you due the 3x3 en cos

The variable y has a proportional relationship with x as suggested by the graph. Use the graph to find the constant of proportionality.

Answers

The relationship has a constant of proportionality of 37

How to determine the constant of proportionality?

From the graph, we have the following points

x = 1 and y = 37

These points can be represented:

x = 1

y = 37

The above parameters can be represented as the following points

(x, y) = (1, 37)

The constant of proportionality of the points is then calculated as

k = y/x

Substitute the known values in the above equation

So, we have the following equation

k = 37/1

Evaluate the quotient

So, we have

k = 37

Hence, the constant of proportionality is 37

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Members of the track team can run 400 meters in an average time of 58.2 sec. The fastest and slowest times varied from the average by 6.4 sec.
Write an absolute value equation to model this equation.

Answers

The absolute value equation modelling this situation is presented as follows:

|x - 58.2| = 6.4.

What is the absolute value of a number?

The function giving the absolute value of another function is defined by the piece-wise rule presented as follows:

|f(x)| = f(x), f(x) ≥ 0.|f(x)| = -f(x), f(x) < 0.

The result is never negative, as the function gives the distance of the function f(x) from the origin, which is the point in which f(x) = 0.

The difference between both the fastest and the slowest time from the average time of 58.2 seconds is of 6.4 seconds, hence the absolute value equation is given as follows:

|x - 58.2| = 6.4.

Which can be solved applying these following rules:

x - 58.2 = -6.4.x - 58.2 = 6.4.

To find the fastest and slowest times, respectively.

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x^3=x^2-1 find all the real zeros

Answers

Answer:

ask this braslate which matirias

Based on current climate trends, which technological innovation could help solve an environmental issue that is likely to threaten Australia in the future?

A.
Water catchments could help stop overfishing.

B.
Water catchments could help slow climate change.

C.
Using electric cars could help slow climate change.

D.
Using electric cars could help lessen droughts.

NO EXPLANATIONS JUST GIVE ANWSER

Answers

The technological innovation could help solve an environmental issue that is likely to threaten Australia in the future is D. Using electric cars could help lessen droughts.

What is drought?

Streamflows decrease, water levels in lakes and reservoirs fall, and the depth to water in wells increases when rainfall is less than normal for a period of weeks to years. If the dry weather continues and water supply issues arise, the dry period may turn into a drought.

For the first time since 2017, Australia ended 2021 in an unusual climatic state, with no region in this famously vast, mostly brown land officially declared to be in drought. It should be noted that the country has drought challenges and electric cars could help reduce the water used.

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find the percentage increase or decrease in each case:
Original value = 70 m3
New value = 98 m3​

Answers

(98 × 100) ÷ 70

= 140%

or

[(98 - 70) × 100] ÷ 70

2800 ÷ 70

40%

basically, 40% increase

Plssssss Help mewith a and b

Answers

a. The relationship between time and distance is not an arithmetic sequence, as the rate of change is not constant.

b. The distance is given by: d(n) = 5n².

What is an arithmetic sequence?

An arithmetic sequence happens when the change in the output is always the same when the input changes by one, that is, the rate of change is constant.

From the table, the increases when the input(time) increases by one are given as follows:

15, 15, 35, 45.

The increases are not constant, hence the relationship between time and distance is not an arithmetic sequence.

What is the distance at t = n?

The equation for the distance is given as follows:

d(t) = 0.5gt².

The constant is:

g = 10.

Hence:

d(t) = 5t².

At a time of n seconds, the distance is found replacing the lone instance of t by n, hence:

d(n) = 5n².

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Demi starts a gardening project with 80 sunflower seeds. She plants 12 of the
seeds. Then she gives 5 seeds each to some friends. Which expression represents
the number of sunflower seeds Demi has left after she gives seeds to f friends?
f
5
C 80 12-5-f
A 80-12-
B 80-12-
D 80-12-5f

Answers

D. 80 - 12 - 5f

5f represents the 5 seeds she gives to each of her (unspecified number of) friends. 12 represents the 12 seeds she planted.
Since she is getting rid of those seeds, they are subtracted from the beginning total of 80.

can someone please help me solve this paper

Answers

the given expressions solved by using factorization.

What is factorization of the expression ?

  To factorize an algebraic statement, we first identify the terms' highest common factors before organising the words in the appropriate way. An algebraic expression's factorization is, to put it simply, the process of expansion in reverse.

Here

4) [tex]x^4-36[/tex]

=> [tex](x^2)^2 -6^2[/tex]

=> [tex](x^2-6)(x^2+6)[/tex]

5)64[tex]c^3+1[/tex]

=> [tex](4c)^3+1^3[/tex]

=> (4c+1)([tex](16c^2+4c+1)[/tex]

6)[tex]k^3-27[/tex]

=> [tex]k^3-3^3[/tex]

=>(k-3)([tex]k^2+3k+9[/tex])

7)[tex]54x^3+250y^3[/tex]

=> 2([tex]27x^3+125y^3[/tex])

=> 2([tex](3x)^3+(5y)^3[/tex])

=> 2 ( 3x+5y)([tex]9x^2+15xy+25y^2[/tex])

8)[tex]3m^4-48n^2[/tex]

=> 3([tex](m^2)^2-(4n)^2[/tex])

=> 3[tex](m^2-4n)(m^2+4n)[/tex]

9)[tex]a^7b^2-ab^2[/tex]

=> [tex]ab^2(a^6-1)\\[/tex]

=>[tex]ab^2(a^3-1)(a^3+1)[/tex]

=> [tex]ab^2(a+1)(a-1)(a^2-a+1)(a^2+a+1)[/tex]

10)[tex]x^3y^2-343y^5[/tex]

=> [tex]y^2(x^3-(7y)^3)[/tex]

=>[tex]y^2(x-7y)(x^2-7xy+49y^2)[/tex]

11)[tex]9y^7-144y[/tex]

[tex]= > 9y(y^6-16)\\= > 9y((y^3)^2-4^2)\\= > 9y(y^3+4)(y^3-4)[/tex]

Hence we can solve by using factorization formula.

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the american management association is studying the income of store managers in the retail industry. a random sample of 49 managers reveals a sample mean of $45,420. the standard deviation of the population is $2,050. using a 95% level of confidence, what is the confidence interval for the population mean?

Answers

Answer:

burgers

Step-by-step explanation:

ahhhhhhhhhhhhhhhhhh

exponential smoothing is meant to be used with time-series data when the data are made up of some or all of the basic components of level, trend, seasonalitiy, and error. if the data series only fluctuates about an average with no trend and no serasonalitiy, which form of smoothing wouldyou employ? if the data include all of these components, which form of smoothing would you employ? how should the smoothing constants be chosen?

Answers

Based on the information provided, ETS is an abbreviation for these three terms (Error, Trend, and Season). Following that, Exponential Smoothing Methods for an ETS system can be described, with the details specified in a smoothing style.

=> As should be obvious, combining Error, Trend, and Season on any occasion in three distinct ways yields a plethora of combinations.

=> The trend depicts the overall layout of the time. It communicates with the data's drawn-out model — its tendency.

=> The seasonal section displays the types associated with anticipated events. Finally, the error component explains what the season and trend components do not. The error is due to the disparity between the first data and the combination of trend and seasonality. As a result, if we crystallize all three parts, we will have the first data back.

=> It has a counted substance conduct when the period of seasonal swings remains constant.

=> We can label our model as ETS (M,A,M).

-> Multiplicative Mistake

-> Added substance Trend

-> Multiplicative Seasonality.

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Use remainder theorem for x^3+8x^2+11x-20 by x-5

Answers

The remainder is 360.

What is the remainder theorem?

When a polynomial p(x) is divided by a linear polynomial (x - a), then the remainder is equal to p(a).

Given a cubic polynomial, x³+8x²+11x-20

The zero of the linear polynomial.

Substitute it in the given polynomial.

As a result, we get the remainder.

x - 5 = 0

x = 5

Substitute 5 to x³ + 8x² + 11x - 20:

5³ + 8×5² + 11×5 - 20 = 125 + 8×25 + 55 - 20 = 160 + 200 = 360

Hence, The remainder is 360.

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pls help? i dont know any of this

Answers

Answer:

Round to the nearest tenth.

a. 0.54 + 0.278 = 0.5 +0.3 = 0.8

b. 2.65 + 28. 17= 2.70 + 28.20 = 30.9

c. 3.09 + 2.41 + 9.86 = 3.10+ 2.40 + 9.90= 15.4

d. 15.234 + 1.37 + 0.76 = 15.20 + 1.3 + 0.8 = 17.30

e. 39.18 + 2.48+ 0.84 = 39.20 + 2.5 + 0.8 = 42.5

Round to the nearest whole number.

f. 4.112 + 3.89 = 4 + 4 = 8

g. 23.14 + 7.6 + 3.67 = 23 + 8 + 4= 35

h. 53.2 + 3.08 + 27.51 = 53 + 3+ 28 = 84

i. 11.08 + 17.28 + 92.6 = 11 + 17 + 93 = 121

j. 24.08+ 7.9 + 3.06 = 24 + 8 + 3 = 35

Step-by-step explanation:

Hopefully it's right!!!

you and your friends go to joshua tree national park on december 13 to watch the peak of the geminid meteor shower. according to the griffith observatory website, the expected number of meteors you will see is 150150 per hour. what is the probability that you will see at least two meteors in the first minute?

Answers

The probability that we will see at least two meteors in the first minute is 1251.5.

What is probability?The probability is the likelihood that something will happen, to put it simply. When we don't know how something will turn out, we can talk about the possibility of one outcome or the likelihood of several. The study of events that fit into a probability distribution is known as statistics. Probability is a branch of mathematics that deals with numerical representations of the likelihood of an event occurring or of a proposition being true.

So, the probability that we will see at least 2 meteors in the first minute:

The expected start we can see in 1 hour is 150150.

Then, in 1 minute:

150150/60 = 2,502.5Rounding off: 2,503

Now, at least 2 meteors in 1 minute:

Probability formula: P(E) = Favourable events/Total events

Solve as follows:

P(E) = Favourable events/Total eventsP(E) =2/2,503P(E) = 7.99P(E) = 1251.5

Therefore, there is a 1251.5 percent probability that we will observe two meteors or more in the first minute.

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A rectangular garden must have a perimeter of 540 feet and and area of at least
12,000 square feet. Describe the possible lengths of the garden. round to the nearest
whole number

I need help please!

Answers

The length of the garden is:  l ≥ 6225ft.

Area = L multiplied by W. Since you measure the area in square feet, your final number should reflect that.

What is a Rectangle?

The internal angles of a rectangle, which has four sides, are all exactly 90 degrees. At each corner or vertex, the two sides come together at a straight angle. The rectangle differs from a square because its two opposite sides are of equal length.

Let l serve as a symbol for the garden's length.

Let w be the symbol for the garden's width.

The perimeter is 540 feet.

The rectangle's circumference is equal to

2(l + w)2(l + w) = 540 l + w = 270.      (1)

The rectangle's area is equal to its length times its width, which equals 12000.            (2)

Make the variable w the subject of the following equation:

w = 270 - l.   (3)

Substitute equation (3) into equation (2)

(270 - l)(l)   ≤    12000

270l  -  l²  ≤   12000

0   ≤  l²  -  270l +  12000

l²  -  270l  +  1200  ≥  0

Solving the quadratic inequality above:

l  ≥  6225

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