Write 78 as a product of prime factors

Answers

Answer 1

Answer:

13 is a prime number, not divisible by any number greater than 1 or less than 13. So the prime factorisation of 78 is: 78 = 2 ⋅ 3 ⋅ 13 This can also be represented by a factor tree:

Step-by-step explanation:

Answer 2

Answer:

78 = 2 ⋅ 3 ⋅ 13

Step-by-step explanation:

78  ends with an even digit, so is divisible by  2 and we find:  78 = 2 ⋅ 39

39  ends with an odd digit, so is not divisible by  2 .

The digits of  39  add up to a multiple of  3 , namely  3 + 9 = 12 . So we can tell that  39  is divisible by  3 : 39 = 3 ⋅ 13

13  is a prime number, not divisible by any number greater than  1  or less than  13 .

So the prime factorization of  

78  is:

78= 2 ⋅ 3 ⋅ 13


Related Questions

I need this quick, anyone got the answer?

Answers

Answer:

C

Step-by-step explanation:

So we have a cylinder with a hole the shape of a rectangular prism through it.

Therefore, our total volume would be the cylinder minus the volume of the rectangular prism.

The volume of a cylinder is given by the formula:

[tex]V=\pi r^2h[/tex]

Use 3.14 for π, 10 for radius, and 15 for the height. Thus:

[tex]V=(3.14)(10)^2(15)\\V=4710[/tex]

So the volume of the cylinder is 4710 cubic feet.

Now, find the volume of the rectangular prism.

The formula for the volume of a rectangular prism is given by:

[tex]V=lwh[/tex]

The length is 5, width is 3, and height is 15. Thus:

[tex]V=(5)(3)(15)\\V=225[/tex]

So, the total volume is:

[tex]V_{\text{Total}}=V_{\text{Cylinder}}-V_{\text{Rectangle}}\\V_{\text{Total}}=4710-225=4485\text{ feet}^3[/tex]

Our answer is C

What is the area of this figure? 3 ft 15 ft 20 ft 17 ft 5 ft 20 ft square feet​

Answers

Answer:

45

Step-by-step explanation:

An agribusiness performed a regression of wheat yield (bushels per acre) using observations on 26 test plots with four predictors (rainfall, fertilizer, soil acidity, hours of sun). The standard error was 1.29 bushels.
(a) Find the approximate width of a 95% prediction interval for wheat yield. (Round your answer to 2 decimal places.)
yˆi ±
(b) Find the approximate width using the quick rule. (Round your answer to 2 decimal places.)
yˆi ±
(c) The quick rule gives a similar result.
a. Yes
b. No

Answers

Answer:

A)y ± [tex]t_{21}[/tex] ( 1.29 )

B) y ± 2.58

C ) yes

Step-by-step explanation:

standard error = 1.29 bushels

approximate width of 95% prediction interval for an individual can be represented as ;  [tex]y[/tex] ± [tex]t_{n-k-1}[/tex] ( SE )

[tex]t_{n-k-1} = critical value of t at n-k-1[/tex] degree of freedom

n = 26

k = 4

a) Approximate width of a 95% prediction interval for wheat yield

[tex]y[/tex] ± [tex]t_{n-k-1}[/tex] ( SE )

Insert the values into the equation

n - k -1 = 26 - 4 - 1 = 21

y ± [tex]t_{21}[/tex] ( 1.29 ) you can get the value of [tex]t_{21}[/tex] from the t table for 21 degrees at 0.05 significance level

B)  The approximate width using the quick rule

y ± 2SE

y ± 2(1.29) = y ± 2.58

C) The quick rule gives a similar result = yes

A certain antihistamine is often prescribed for allergies. A typical dose for a 100​-pound person is 19mg every six hours. Complete parts​ (a) and​ (b) below. Following this​ dosage, how many 13.2mg chewable tablets would be taken in a​ week? A​ 100-pound person could take ____ tablets in a week. ​(Round to the nearest whole number as​ needed.)

Answers

Answer:

40 tablets

Step-by-step explanation:

What we want to do is find how many mg of antihistamine you can take in a week.

If you can take 19mg in 6 hours, that means you can take [tex]19\cdot4=76[/tex]mg per day (because [tex]24\div6=4[/tex], so you can take 19mg every 6 hours 4 times in a day.)

There are 7 days in a week, so you can take [tex]76\cdot7=532[/tex] mg per week.

Now, we know how many mg of antihistamine you can take per week. If we take antihistamine in increments of 13.2mg, then the total amount of tablets we can take per week is going to be [tex]532\div13.2[/tex], which is approximately equal to 40.

So you can take 40 tablets in a week if you are 100 pounds.

Hope this helped!

Answer:

Step-by-step explanation:

b. A​ 100-pound person could take

 

enter your response here mL in a week.

​(Round to the nearest whole number as​ needed.)

Please help, I have no idea how to solve this. Can someone teach me how? 6a^2+4f-3 when a=2 and f=4

Answers

Answer:

157

Step-by-step explanation:

First, let's subsitute a and f.

6(2)^2 + 4(4) - 3

Remeber the order of operations. Paranthesis, exponents, multiply, divide, add, subtract.

12^2 + 16 - 3

144 + 16 - 3

157 is the answer. Hope this helps!!!!!!

what is formula to calculate the area of circle​

Answers

Step-by-step explanation:

Area of circle

[tex] = \pi {r}^{2} [/tex]

r = radius of the circle

Answer:

[tex]\pi[/tex]r²

Step-by-step explanation:

A=[tex]\pi[/tex]r²

point I is on line segment HJ. Given HJ=15 and IJ=10, determine the length HI

Answers

Answer:

Step-by-step explanation:

15 + 10 = 25

HI = 25

Answer: 5

Step-by-step explanation:

One environmental hazard recently identified is overexposure to airborne asbestos. In a sample of 10 public buildings over 20 years old, three were found to be insulated with materials that produced an excess number of airborne asbestos bodies. what is the approximate probability that another buitding of this rype will have this problem? What method are you using to assign this probability?

Answers

Answer:

1. 0.3

2. Relative frequency

Step-by-step explanation:

We would be calculating for p(A) which is the probability of A. With A being that public buildings would be found to be insulated with same materials that causes same issues

n = sample space of public buildings = 10

F = frequency = 3

P(A) = 3/10 = 0.3

Therefore 0.3 is the approximate probability of another building having same issues

Question 2 says we should find method used to assign probability

The method used is relative frequency method and it is determined by:

P(A) = frequency(f)/total number of data values(n).

Which set of data is displayed in the box plot below?

Answers

Answer:

It would tske to long for me to break it down but my best bet is B

Step-by-step explanation:

Help! Please what’s the answer

Answers

Answer:

837 sq. ft

Step-by-step explanation:

area of garden = area of rectangle + area of semicircle

area of rectangle = 20 X 34 = 680 sq. ft

area of semicircle  = 1/2 X 3.14 X 100 = 157 sq.ft

area of garden = 837 sq. ft

i am 1 brainly away from virtuoso, your help would be appreciated

A snail travels 820 mm in 0.75 minutes. What was his speed in m/s?

Answers

Answer:

speed in m/s=0.01822 metre/s

Step-by-step explanation:

Conversation rate of mm to m is

1000 mm = 1 metre

820 mm= 820/1000

829 mm= 0.82 metres

Conversation rate of minutes to second

I minute = 60 seconds

0.75 minute = 60*0.75 seconds

0.75 minute= 45 seconds

speed in m/s= 0.82 metres/45 seconds

speed in m/s= 0.82/45

speed in m/s=0.01822 metre/s

Point F bisects segment GH. Find GH if GF = 14 1/2 feet.

Answers

Answer:

Segment GH = 29 ft

Step-by-step explanation:

Point F bisects segment GH means that the segment GH is being divided into two by point F.

If GF = 14 1/2 feet

Since point F divides GH into two, multiplying GF by two will give segment GH

GH= 2GF

GH= 2(14 1/2

GH= 2(29/2)

GH= 29 ft

Segment GH = 29 ft

Travis's income is $2300 a month, and he plans to budget 3/7 of his income for savings and 1/10 of his income for entertainment. What fraction of his income does he plan to spend each month on these two items together? Express your answer in lowest terms. Please explain how you did it

Answers

Step-by-step explanation:

2,300×3÷7=985.71 The amount of money saved

2300×1÷10=230the amount of entertainment

985.71+230=1215.71 total

1215.71÷2300=0.5285 Entertainment money + reserve money ÷ total money

 

The income that he plan to spend each month on these two items together is 0.5285.

What is a fraction?

A fraction represents a part of a number or any number of equal parts.

Given; Travis's income is $2300 a month, and he plans to budget 3/7 of his income for savings and 1/10 of his income for entertainment.

We need to find the income that he plan to spend each month on these two items together.

The amount of money saved;

2,300×3÷7 = 985.71

The amount of entertainment;

2300×1÷10=230

The total 985.71 + 230 = 1215.71

Now, Entertainment money + reserve money ÷ total money

1215.71÷2300 = 0.5285

The income that he plan to spend each month on these two items together is 0.5285.

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write as an equation: 1/3 of a shipment of books weights 28 pounds

Answers

Answer:

x=28 (pounds) * 1/3

Step-by-step explanation:

28/3 gives you 1/3 of the shipment weight.

For the following right triangle, find the side length x.
х
24

Can anyone help me??Need help ASAP!

Answers

Answer:

25

Step-by-step explanation:

We can use the Pythagorean Theorem to find the value of x,

The Pythagorean Theorem states that [tex]a^2 + b^2=c^2[/tex], where a and b are the legs and c is the hypotenuse.

We already know a and b’s value so we can substitute inside the formula to find the length of the hypotenuse.

[tex]24^2+7^2=c^2\\\\576+49=c^2\\\\625=c^2\\\\c=25[/tex]

Hope this helped!

Brainliest!
Divide
18198
--------
27
A.518
B.608
C.674
D.689

Answers

Answer:C

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

27)18198(674

    162

  -

    --------

     199

     189

   -

    ---------

        108

        108

      -

         

       ------

          0

        ------

What type of number is -44.1?

Answers

negative number but to be specific it’s a negative decimal

Answer:

-44.1 is a real and complex number

Step-by-step explanation:

Richard has 3 times as many music CDs as Benny does.

If Richard has y CDs, the number of CDs Benny has is given by the expression

. If Richard has 30 CDs, Benny has

CDs.

Answers

Answer:

y = 10 CDs

Step-by-step explanation:

30 divided by 3 equals 10

10 times 3 equals 30

Answer:

first blank is y/3

second blank is 10

Step-by-step explanation:

What is the simplified form of the expression below? (6 + 7b) + 14

Answers

Answer: 20+7b

Step-by-step explanation:

Given

 (6+7b)+14

Take off parentheses

=6+7b+14

Move like terms together (Commutative property)

=6+14+7b

Combine like terms

=20+7b

Hope this helps!! :)

Please let me know if you have any question

Answer:

[tex]\huge\boxed{ answer}[/tex]

[tex]\blue\star[/tex]6 + 7b + 14 = 0

[tex]\blue\star[/tex]7b + 20 = 0

[tex]\blue\star[/tex]7b = - 20

[tex]\blue\star[/tex]b = -20\7

[tex]\star[/tex]simplified form

[tex]\blue\star[/tex](6 + 7b) +14

firstly remove the brackets.

[tex]\blue\star[/tex]6 + 7b +14

seprate terms and variables

[tex]\blue\star[/tex] 7b +20

[tex]\huge\boxed{7b + 20}[/tex]

Hope it helps..

Translate the English phrase into an algebraic expression: the sum of 17y² and 19.

Answers

Answer:

17y^2+19

Step-by-step explanation:

sum means add

Answer:

19+ 17y²

Step-by-step explanation:

Find the opposite of the given number. -18.6

Answers

Answer:

18.6

Step-by-step explanation:

Answer:

opposite of -18.6=18.6

What is the simplest form of this expression? -b^3 (3b + 1) – 2b^4​

Answers

Answer:

-5b^4 - b^3

Step-by-step explanation:

-b^3 (3b + 1) – 2b^4​

Distribute

-3b^4 - b^3 -2b^4

Combine like terms

-5b^4 - b^3

find the derivative of f(x)=x+1/x-1 using first principal​

Answers

f ' ( x ) = 1 ( x + 1 ) 2

 

Explanation:

differentiating from first principles

f ' ( x ) = lim h → 0

 

f ( x + h ) − f ( x ) h

f ' ( x ) = lim h → 0

 x + h x + h + 1 − x x + 1 h

the aim now is to eliminate h from the denominator

f ' ( x ) = lim h =0  

( x + h ) ( x + 1 )− x ( x + h + 1) h ( x + 1 ) ( x + h + 1 )

f ' ( x ) = lim h → 0

 x 2 + h x + x + h − x 2 − h x − x h ( x + 1 ) ( x+h + 1 )

f ' ( x ) = lim h → 0

 

h 1 h 1 ( x + 1 ) ( x + h +1 )

f ' ( x ) = 1 ( x + 1 ) 2

Find the volume of the following solid figure. Use = 3.14.
V = 4/31r. A sphere has a radius of 4.5 inches.
Volume (to the nearest tenth) =
cubic inches

A. 56.5
B. 381.5
C. 84.8

Answers

Answer:

B. 381.5

Step-by-step explanation:

[tex]r = 4.5\\\pi = 3.14\\\\V = ?\\\\Volume = \frac{4}{3} \pi r^3\\\\V= \frac{4}{3} \times 3.14 \times (4.5)^3\\\\V = \frac{4}{3} \times 286.1325\\\\V = \frac{1144.53}{3} \\\\V = 381.51\\\\Volume = 381.51 \: inches^3[/tex]

Find the value of X Need help ASAP.

Answers

1. 4 inside angles must sum to 360:

X = 360-45-65-95 = 155

2. All the outside angles must sum

To 360:

2x + 70+ 86 + 9 = 2x + 248

2x = 360-248

2x = 112

X = 112/2 = 56

3. Sum of interior angles for 6 sides figure = 720.

X = 720 - 90-120-130-140-150

X = 90

4. Exterior angles sum to 360

4x +x + 98 + 162 = 360

5x + 260 = 360

5x = 100

X = 100/5

X = 20

Write this number in standard form 70,000 + 5,000 + 20+3

Answers

Answer:

70,523

Step-by-step explanation:

This is standard form there no way to show.

What are integers between -8 and 2 not inclusive?? Please help me

Answers

All numbers between -8 and 2 are integers except 0

All the integers between - 8 and 2 are,

{- 7, - 6, - 5, - 4, - 3, - 2, - 1, 1 }.

What is an expression?

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Given that;

The numbers is,

⇒ - 8 and 2

Now, All the numbers between - 8 and 2 are,

⇒ - 7, - 6, - 5, - 4, - 3, - 2, - 1, 1

Thus, All the integers between - 8 and 2 are,

{- 7, - 6, - 5, - 4, - 3, - 2, - 1, 1 }.

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is the number 10,104 divisible by 4?

Answers

Step-by-step explanation:

A no. is divisible by four if the last two digits is a multiple of 4

04 is a multiple of four

The no. 10,104 is divisible by 4

what are the orders pairs for this figure

Answers

A is (2,-4) B (-2,5) C (0,-6) D(-4,-3) E(3,0) F(5,4)

Sonia is walking 2.5 miles home from school. She leaves at 4:00 P.M., and gets home at 4:45 P.M. Graph the line that represents Sonia’s distance from school at a given time. Find and interpret the slope of the line.

Answers

Answer:

M = 1/18

Step-by-step explanation:

The slope is 1/18 mi/min, which means Sonia walks at a rate of 1 mile every 18 minutes.

What is slope of a line?

The slope of the line is the ratio of the rise to the run, or rise divided by the run. It describes the steepness of line in the coordinate plane.

Given that, Sonia is walking 2.5 miles home from school.

She left at 4:00 pm and got home at 4:45 pm. She took 45 minutes to get there.

We can interpret the information as two points, the first one is (0,0) that represents the starting point. The second point is (45, 2.5), which represents the ending point when she arrived home. Let's graph these points and draw a line through them.

To find the slope, divide 2.5 miles by 45 minutes,

Thus, slope =2.5/45

m= 1/18 miles per minute

Therefore, the slope is 1/18 mi/min, which means Sonia walks at a rate of 1 mile every 18 minutes.

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