Question

What is the surface area of a sphere with radius of 3.5? A. 12.25p B. 14p C. 24.5p D. 49p

Answer 1

do you know formula for calculating surface area of a sphere?

Answer 2

yes but I keep getting 153.94

Answer 3

In all answers there are p, so I guess its \(\pi\)? So you should not write 3.14 instead of it but just keep it.

Answer 4

this is due today and I have no idea what you just said

Answer 5

write down formula of sphere for me

Answer 6

4 pi r 2

Answer 7

ok so
\[S=4\pi r^2=4\pi3.5^2=4\pi12.25=49\pi\]
and taht's your answer, its D
you don't need to use 3.14 instead of \(\pi\) because no one asked you. 3.14 is just approximation of \(\pi\) and for math you need the most accurate result.

Answer 8

thanks but I found it on yahoo answers

Answer 9

do you understand why its not 153.94?

Answer 10

no but who cares