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2 years ago

Circumference and Area questions look at the picture

Mathematics

1 answer:

Helga [31]2 years ago

5 0

Note that the formula for the circumference of a circle is πd, while the formula for the area of a circle is πr².

π≈3.14

A. C=πd

Simply plug in the numbers into the formula.

Diameter=Radius*2

17*2=34

C=34(π)

B. (π)(5²)

Plug in the numbers into the formula. Remember that half of the diameter is the radius.

C. (π)(4.5)

There are two possible formulas that could be used to calculate the circumference of a circle: πd and 2πr.

The expression above is simply multiplying the circle's radius times pi. Therefore, it is not a method that could be used to find the circumference of a circle.

D. (π)(6.5²)

Remember that the formula for calculating the area of a circle is πr².

Half of the diameter is 6.5 (13.5/2=6.5). 6.5 cm. is the radius. Now just plug the numbers into the formula.

(π)(6.5²)

Therefore, the last answer choice is the correct answer.

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A camp counselor and four campers are to be seated along a picnic bench. In how many ways can this be done if the counselor must

Lady_Fox [76]

Answer: 6 ways

Step-by-step explanation:

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1 year ago

sarah is putting her sweaters in boxes to organize her closet.seven sweaters can fit in each box. sarah will fill as many boxes

Morgarella [4.7K]

Given: Sarah can fit 7 sweaters in a box

She has 38 sweaters

the remaining sweaters will stack on the shelf in the closet.

By dividing 38 by 7 we will get:

$\frac{38}{7}=\frac{35+3}{7}=\frac{5\cdot7+3}{7}=5\frac{3}{7}$

So, she will need 5 boxes, she will put 35 sweaters in 5 boxes

The remaining sweaters = 38 - 35 = 3 sweaters

So, the answer is: 3 sweaters will go in her closet

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1 year ago

Expression.is of what number? Write a division expression to match this question.

nirvana33 [79]

3/4 is 1/3 of what number?

For this problem we just need to do the following division:

$\frac{x}{3}=\frac{3}{4}$

And we can solve for the value of x desired and we got multiplying both sides by 3:

$x=3(\frac{3}{4})=\frac{9}{4}$

So then we can conclude that 3/4 is 1/3 of 9/4

Answer: 9/4

Expression:

$\frac{x}{3}=\frac{3}{4}$

3 0

1 year ago

What is the area of a sector with a central angle of \frac{5 \pi }{6} radians and a diameter of 5.6 in.? Use 3.14 for π and roun

kvasek [131]

Answer:

10.26 in²

Step-by-step explanation:

The area (A) of the sector is

A = area of circle × fraction of circle

= πr² × $\frac{\frac{5\pi }{6} }{2\pi }$

= π × 2.8² × $\frac{5}{12}$ ≈ 10.26 in²

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2 years ago

Kelly has a ribbon that is 60 inches long she cuts at 40% of ribbon for an art project while working on the project she decided

Amiraneli [1.4K]

Answer:

8.4 inches

Step-by-step explanation:

To find the amount of inches, multiply the length by the percent. A percent is 40% but can also be written as a decimal conversion as 0.4. Then 40% of 60 inches is 0.4(60)= 24 inches.

However, she didn't use all 24 inches. She used 35%. This converts to 0.35 and then multiply for 0.35(24) = 8.4 inches.

She used 8.4 inches.

4 0

3 years ago