-5/8
.....................
It is 18 because the radius is half the diameter and 9 x 2 = 18.
Answer:
A = 24t² + 2t
Step-by-step explanation:
The shaded area (A) is calculated as
A = area of outer square - area of rectangle
= (5t)² - t(t - 2)
= 25t² - t² + 2t
= 24t² + 2t
Because no perfect squares are factors of 37, the most simplified that the square root of 37 can get is
√37, or approximately 6.08