## anonymous 4 years ago Find the surface area of the sphere to the nearest square unit. hold on, i have to draw it

1. anonymous

|dw:1347568958290:dw|

2. lgbasallote

$\huge SA = 4\pi r^2$ will that help?

3. anonymous

just make sure ur using the radius not the diameter

4. anonymous

no it doesn't help/: A. 13 in.2 B. 50 in.2 C. 6 in.2 D. 3 in.2

5. anonymous

how do i find the answer

6. lgbasallote

7. anonymous

2?

8. lgbasallote

no. that is the diameter. to get the radius, divide that by 2

9. anonymous

so 1?

10. lgbasallote

right. so substitute that to the equation i gave you

11. anonymous

i feel like an idiot, idk what to do

12. lgbasallote

r = 1 right? because it's the radius`

13. anonymous

yes

14. anonymous

would it be 3 in^2

15. lgbasallote

so replace r with 1 in the equation i wrote...what do you get?

16. anonymous

13 in^2

17. anonymous

?

18. lgbasallote

will you elaborate how you got that?