can someone please help me with this because i keep getting the wrong answer i used the formula t=4 times pi times r^2 bt i can not get the right answer help please
Find the surface area of a sphere with a diameter of 78. (use 3.14 for pi)
Answer 979.68
76,415.04
489.84
19,103.76

Question

can someone please help me with this because i keep getting the wrong answer i used the formula t=4 times pi times r^2 bt i can not get the right answer help please 
Find the surface area of a sphere with a diameter of 78. (use 3.14 for pi)
Answer    979.68 
   76,415.04 
   489.84 
   19,103.76

amistre64 · Answer

surface area of a sphere is: 4pi r^3

anonymous · Answer

ooo ok thnk you

amistre64 · Answer

youre welcome

anonymous · Answer

can you help me with one more please?