I don’t know how to do this i need help

See below.

Step-by-step explanation:

You already have b correct, so let’s do d.

Remember the SOHCAHTOA rule (see image).

In this case, we can use either CAH or SOH. I’ll use CAH.

cos(45) = d/8

d = cos(45) * 8

d = 5.65 = 6

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)