Question

A builder is remodeling a circular deck to increase the diameter from 8 feet to 14 feet. By how much will the circumference of the deck increase? By how much will the area of the deck increase?

Answer 1

@Mehek14

Answer 2

ok so find the circumference of each and the area

Answer 3

Which formula for the circumference?

Answer 4

I think its C=pi2r

Answer 5

circumference is 2πr

Answer 6

\[Radius = Diameter / 2\]

Answer 7

K

Answer 8

To find the increase, first we need to find the Circumference of the first deck

Answer 9

\[C = 2*3.14*8 = 50.27..\]

Answer 10

A= 200.96

Answer 11

Now we need to find the remodeled one:\[C = 2 * 3.14 * 14 = 87.96..\]

Answer 12

Do you have any answer choices?

Answer 13

@HelpMePlease14

Answer 14

No

Answer 15

OK, so to find the increase we take:\[87.96 - 50.27 = 37.69 ; ~ Rounded: 38\]

Answer 16

I got 87.92

Answer 17

As the circumference with 14 inches

Answer 18

For the Radius did you use 3.14 or pi

Answer 19

3.14

Answer 20

Well its still 87 so... its not that important

Answer 21

C = 2 pi r
C = 2 (3.14) 14
C = 6.28 (14)
C = 87.92

Answer 22

Ok

Answer 23

So the answer is 38(Rounded)

Answer 24

That's how much will the circumference of the deck increase?

Answer 25

Yes that is how much the Circumference will increase

Answer 26

OK thx

Answer 27

Your Welcome

Answer 28

How to simplify 414.48 into a whole number?

Answer 29

Whole numbers: Numbers with no fractions, decimals, or negative. So we need to round 414.48

Answer 30

Will it be 414?

Answer 31

@KendrickLamar2014

Answer 32

You got it =)

Answer 33

Thx

Answer 34

@KendrickLamar2014 can u help me with another problem?

Answer 35

i'll try

Answer 36

K the question:
How do circumference and area change when the radius of a circle is doubled? Give an example.

Answer 37

@KendrickLamar2014

Answer 38

Didn't you already ask this Question: http://openstudy.com/study#/updates/552c3761e4b0d7047f5b0a11