Use the Pythagorean theorem to find the missing length in the right triangle

Hi, there your answer is 25

Step-by-step explanation:

Here's the Pythagorean Theorem formula

=

49+576=

625=

Hope this helps :)

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)