Lisa finished her history assignment in 7/8 hours. Then she completed her English assignment in 1/4 hours. How much more time did Lisa spend on her history assignment?

Answer:

(4 * 1.5) * 2 = 12

Step-by-step explanation:

Answer:

(1.75)(1.75)

Step-by-step explanation:

[tex](1.75)^{2} =(1.75)(1.75)[/tex]

Hope this helps

Answer:

you are crazy

Step-by-step explanation:

that is a whole assignment

Refractive index is the ratio of sin(i) to sin (r). Medium 2 is sodium chloride with a refractive index of 1.54.

A material's refractive index (sometimes called refraction index or index of refraction) is a dimensionless quantity that specifies how quickly light passes through it.

As we know that the Refractive index is the ratio of sin(i) to sin (r), and it can be represented as,

[tex]\rm Refractive\ Index = \dfrac{Sin(i)}{Sin(r)}[/tex]

where

i is the incident angle and

r is the refraction angle.

Now, the refractive index can be written as for the given medium can be written as,

[tex]\rm Refractive\ Index = \dfrac{Sin(i)}{Sin(r)}\\\\[/tex]

[tex]\rm Refractive\ Index = \dfrac{Sin(79.5)}{Sin(39.6)}=1.542[/tex]

Now, if we take the ratio of the refractive index of the two mediums, then

[tex]\rm 1.542 = \dfrac{n}{1.0003}\\\\n = 1.542 \times 1.0003\\\\n= 1.5425\ \approx 1.54[/tex]

Hence, Medium 2 is sodium chloride with a refractive index of 1.54.

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Answer:

What is medium 1?

air

What is medium 2?

lucite

Step-by-step explanation:

Answer:    26

Step-by-step explanation:

I would say 26 because you multiplying 3 and 4 and then add whatever number you get for 8 and 5.

Answer:

Area = 2.28 sq km

Perimeter = 13.7 km

Step-by-step explanation:

[tex]A(\triangle)=\frac{1}{2}(1.2)(3.8)[/tex]

[tex]\implies A(\triangle)=(1.2)(1.9)[/tex]

[tex]\implies \boxed{\red{\bold{A(\triangle)=2.28\:km^2}}}[/tex]

[tex]P(\triangle)=7+1.2+5.5[/tex]

[tex]\implies \boxed{\purple{\bold{P(\triangle)=13.7\: km}}}[/tex]

Answer:

1.

$.33

$3

2.

all the answers can be found when the rate is known which is

grapes are sold at $3 per pound

Step-by-step explanation:

$6 ÷ 2 pounds = $3 per 1 pound

this means 1 pound of grapes is $3

next row

1 ÷ 3 = $.33

3rd row

1 multiplied by 3 = $3

2.

all the answers can be found when the rate is known which is

grapes are sold at $3 per pound

Answer:

A number line going from 2 to 7. A solid circle is at 4. Everything to the left of the circle is shaded.

Step-by-step explanation:

The pizza itself will cost $12, and because toppings cost $2 apiece, the maximum amount of toppings that can be used is 4.

4·2=8

8+12=20

So, by putting a closed circle on 4, going to the left, the line shows that she can buy anywhere from 0-4 topping on her pizza.

Answer:

A

Step-by-step explanation:

Answer:

26

Step-by-step explanation:

SORRY IF IM WRONG

Answer:

sorry there's no explanation IN this question

Answer:

Inconclusive.

Step-by-step explanation:

This equation is not understandable due to the lack of clarity, thank you.

Answer:

the second one

Step-by-step explanation:

1. cross multiply

3/1 = m/5

15 = m

m = 15

Answer:

13

Step-by-step explanation:

To find the value of y, we will use the substitution method

Plug the y of the top equation into the other equation

2(5x + 3) = 18x - 10

Distribute the 2 into the equation inside the parenthesis

10x + 6 = 18x - 10

Subtract 10x from both sides

10x + 6 = 18x - 10

-10x        -10x

6 = 8x - 10

Add 10 to both sides

6 = 8x - 10

+10      + 10

16 = 8x

Divide both sides by 8

16/8 = 8x/8

x = 2

Sub the 2 in the place of x into one of the original equations. We will use the first one.

y = 5(2) + 3

y= 10 + 3

y = 13

Answer:

y = 13

Step-by-step explanation:

y = 5x + 3

2y = 18x- 10

substitution (substituting y with the y value given):

2( 5x + 3 ) = 18x - 10

solve:

10x + 6 = 18x - 10

10x - 18x = -10 - 6

-8x = -16

x = 2

now plug in the x:

y = 5( 2) + 3

y = 10 + 3

y = 13

The probability that you land exactly one shot in each of the three rings is 0.122

The probability of hitting each section will be the quotient between the area of the section and the total area of the target.

The area of the target is:

A = 3.14*(12 in)^2 = 452.16 in^2

The area for the smallest circle is:

A₁ = 3.14*(4 in)^2 = 50.24 in^2

So the probability of hitting the smallest circle is:

p₁ = A₁/A = (50.24/452.16) = 0.11

For the first ring, the area is:

A₂ = 3.14*(8in)^2 -  50.24 in^2 = 150.72 in^2

So the probability of hitting this ring is:

p₂  = (150.72)/(452.16) = 0.33

The probability of hitting the final ring is 1 minus the probabilities of hitting the two other regions, so we have:

p₃ = 1 - 0.11 - 0.33 = 0.56

The joint probability of hitting one arrow in each region, is given by the product between the individual probabilities for each region times the permutations (the permutations for 3 arrows are 3! = 3*2*1  = 6)

So the probability is:

P = 0.11*0.33*0.56*6 = 0.122

If you want to learn more about probability, you can read:

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Answer:

4

Solving steps:

In order to find the sequence substract the previous

=> 18 - 14

=> 4

So, 14 + 4 = 18

18 + 4 = 23

etc.

Answer:

That’s her nephew!

He could also be the father.

Step-by-step explanation:

Answer: 9

Step-by-step explanation:

Answer:

16?

Step-by-step explanation:

1 = 4

2 = 7

3 = 10

4 = 13

5 = 16

The percentage of the payments made were due to interest is 32.6 %. Then the correct option is B.

The amount of something is expressed as if it is a part of the total which is a hundred. The ratio can be expressed as a fraction of 100. The word percent means per 100. It is represented by the symbol ‘%’.

The following table shows a portion of a five-year amortization schedule.

A 5-year amortization schedule.

Loan amount or principal: 10,900 dollars.

The interest rate on loan: 10. 95 percent.

The table will be

Month         Payment         Principal         Interest         Balance

  15               236.72            155.87            80.85           8704.27

  16               236.72            157.29            79.43           8546.98

  17               236.72            158.73            77.99            8388.25

  18               236.72            160.18            76.54            8228.07

  19               236.72            161.64            75.08            80.66.43

  20              236.72            163.11             73.61             7903.32

Total payment = 6 × 236.72 = $ 1420.32

Total interest = 80.85 + 79.43 + 77.99 + 76.56 + 75.08 + 73.61

Total interest = $ 463.38

Then the percentage will be

[tex]\rm Percentage = \dfrac{463.38}{1420.32}*100\\\\Percentage = 32.625 \approx 32.6\ \%[/tex]

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Answer:

Given

no of Grade 6 students = 220

no of Grade 7 students = 40 more than grade 6 students

Step-by-step explanation:

boys Grade 7 students = no of Grade 6 students - 40 more than grade 6 students

boys Grade 7 students = 220 - 40

boys Grade 7 students = 180 grade 7 boy students are enrolled

Therefore, 180 grade 7 boy students are enrolled.

4

Step-by-step explanation:

4 because it sounds close to me

The probability that it lands on an even number or a number greater than 6 are 1/2 and 1/4 respectively

Data;

The probability of an event occurring is the ratio between number of possible outcomes to the total number of sample space.

a)

The probability of having an even number is

[tex]P = \frac{4}{8} = \frac{1}{2}[/tex]

b)

The probability of having a number greater than 6 is

[tex]P = \frac{2}{8} = \frac{1}{4}[/tex]

The probability that it lands on an even number or a number greater than 6 are 1/2 and 1/4 respectively

Learn more on probability here;

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Answer:

180°

Step-by-step explanation:

the angles in a triangle add up to 180°

Answer:

243

Step-by-step explanation:

(3^5 – 3^4) (3^3 + 3^2)

= (243 – 81) (27 + 9)

= (162) (36)

= 5832

24 = 8*3

because 832 can be divided by 8 and 5+8+3+2 = 18 is divisible by 3,

5832 is divisible by 24

Answer:

Systems with infinitely many solutions are equations that are the same (on top of one another)

Ex:

4x=4 and 2x=2

4x=0, 5x=0

A square prism has the same the base area and volume as the square pyramid is 4 units.

The volume of a square pyramid is,

[tex]a^{2} *h/3[/tex]

[tex]256=a^{2} *12/3[/tex]

[tex]256=4 a^{2}[/tex]

[tex]256/4=a^{2}[/tex]

[tex]64=a^{2}[/tex]

[tex]a=8[/tex]

Now we know that the square is 8 by 8.

A square pyramid has a height of 12 units and a volume of [tex]256 units^3[/tex]

The volume of a square prism is a²h

[tex]V=a^{2} h[/tex]

[tex]256=64h[/tex]

[tex]256/64=h[/tex]

[tex]h=4[/tex]

The height is 4 unit

Also, a square pyramid is 1/3 the volume of a square prism.

[tex]\frac{12}{3}=4[/tex]

Therefore,we get a square prism has the same the base area and volume as the square pyramid is 4 units.

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Answer:

4 units

Step-by-step explanation:

I got it right on the test :)

Answer:

See Below

Step-by-step explanation:

[tex]m \angle \: 1 = m \angle \: 4 \: \: \: (1) \\ (vertical \: angles) \\ \\ m \angle \: 7 = m \angle \: 6 \: \: \: (2) \\ (vertical \: angles) \\ \\ m \angle \: 4 + m \angle \: 6 = 180 \degree \: \: \: (3) \\ (Interior\:angles \: on \: same \: side \: of \: transversal) \\ \\ from \: equations \: (1),\: (2) \: and \: (3) \\ \\ \red { \boxed{ \bold{m \angle \: 1 + m \angle \: 7 = 180 \degree}}} \\ \\ thus \: proved[/tex]