## this 3 years ago some on help me plllz a sphere has a surface area of 32in^2 a,radius=_______ b,volume=_________

1. ajprincess

Surface area of a sphere = $$4\pi r^2$$ $$2=4\pi r^2$$ From this r(radius) can be found in terms of $$\pi$$ Volume of a sphere=$$\large\frac{4}{3}\pi r^3$$ Can u find nw? @this

2. this

sa=4pi r^2 32/4pi=4pir^2/4pi 32=r^2 i dont know what to do next):

3. ajprincess

32/4pi=4pi r^2/4pi 8/pi=r^2 to find r. find the sqrt of 8/pi r=sqrt(8/pi)

4. ajprincess

to find the volume use v=4/3pi r^3

5. this

thanks so much @ajprincess

6. ajprincess

Welcome:) Did u find the volume?

7. this

i got 2.25=r is that right?

8. ajprincess

pi=?

9. this

i cancel out the pi

10. ajprincess

what did use for pi? 3.14 or 22/7?

11. this

i use 3.48

12. this

wait let me show u how i did it the whole thing

13. ajprincess

ok:)