Question

http://prntscr.com/b0ohg7
I know area of circle is 3.14(r^2)
I have the radius of both circles
7.6 and 2.2 and plugged them into the formula and subtracted them

But I keep getting the wrong answer?

Answer 1

you need to find the area of the whole circle and the area of the middle circle then subtract the area of the whole thing by the area if the middle circle and you have your answer

Answer 2

what do you get for the radius of the hot tub and radius of tub+ deck?

Answer 3

That's what I did

Answer 4

I stated above : )

Answer 5

oh 7.6 and 2.2 is not correct

Answer 6

Ah, I see. What did I do wrong?

Answer 7

radius = 1/2 diameter and diameter of the tub is 5.4

diameter of whole thing = 5.4 + 2(2.2)

Answer 8

what is 5.4 / 2?

Answer 9

2.7

Answer 10

right thats the radius of the hot tub

daimeter of whole thing is 9.8 so what radius?

Answer 11

I'm a bit confused.
Why is it 2(2.2) and why are we dividing 5.4 by 2 and where did 9.8 come from?

Answer 12

5.4 is the diameter of the hot tub and the radius is 1/2 the diameter.

Answer 13

Understood so far

Answer 14

Ah, that makes sense now.

Answer 15

diameter of the whole thing is 5.4 + 2.2 + 2.2

Answer 16

Alright continue!

Answer 17

well what does that sum come to?

Answer 18

9.8 correct?

Answer 19

yes so radius of whole thing = half of this 4.9

so now you have the 2 radii

4.9 and 2.7

use these in the area formulae

Answer 20

Thank you!

Answer 21

One second, where did you get 2.7 from?
@welshfella

Answer 22

@zepdrix

Mind telling me where he/she got 2.7 from and helping me with some others?

Answer 23

5.4/2=2.7

Answer 24

I meant to put 4.9 haha.

Answer 25

@peachpi

Where did that come from?