I really need help on this !

S.A = 804.4 ft

Step-by-step explanation:

Given the following data;

Diameter of sphere = 16 ft

Radius = diameter/2

Radius, r = 16/2 = 8 ft

Pie, π = 3.142

To find the surface area of a sphere;

Mathematically, the surface area of a sphere is given by the formula;

S.A = 4πr²

Substituting into the formula, we have;

S.A = 4 * 3.142 * 8²

S.A = 12.568 * 64

S.A = 804.4 ft

you probably already have the answer but anyways it's b. 15.0

step-by-step explanation:

10.416 meters per second

step-by-step explanation:

distance=1 00 meters

time= 9.6 seconds in decimal form or 9 3/5 as a mixed number

average speed= 100/9.6

=10.416 meters per second or 10 52/125 as a mixed number.