Its due tonight, please help

using:

a^2 + b^2 = c^2

let: a = x,b = 16,c = 20.

hence:

x^2 + 16^2 = 20^2

x^2 = 20^2 - 16^2

x^2 = 400 - 256

x^2 = 144

taking the square root of both sides:

gives, x = 12.

$30.32

step-by-step explanation:

65.00*.12=2.80

65.00-2.80=57.20

57.20*1.06=60.632

60.632/2=30.316