Nate paid $13.25 for a shirt. This amount includes a sales tax of 6%. What was the cost of the shirt before tax?

$12.50

Step-by-step explanation:

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)

a - base

b - exponent

so,