Question

What is the surface area of the sphere? (I'm giving metals!)

Answer 1

The surface area of a sphere is equal to 4 times Pi (π) times the radius (r) squared.

SA=4πr^2


Substitute the values of the radius (r=16) and an approximation for Pi (3.14) into the formula to find the surface area of the sphere.

SA≈+4*3.14*16^2


Squaring a number is the same as multiplying the number by itself (16⋅16). In this case, 16 squared is 256.

SA≈+4*3.14*256


Multiply 4 by 3.14 to get 12.56.

SA≈+12.56*256


Multiply 12.56 by 256 to get 3215.36.

SA≈+3215.36

Answer 2

Knowing the axis of the sphere is equivalent to the diameter then you know that half the diameter is the radius and using the formula for the surface area of a sphere:
\[A = 4 \pi r^2\]
You can plug in your value for radius ( r ) and solve.

Answer 3

It's supposed to be in terms of PI.

Answer 4

It's really 4*pi*8^2

Answer 5

calcules or geometry ?

Answer 6

Geometry.