Given l=39in, w=20in, h=18in, and x=36.1in., find the length of d round to the nearest tenth

Using the formula for the diagonal of a rectangular prism:

d^2 = l^2 + w^2 + h^2

Plugging in the values:

d^2 = 39^2 + 20^2 + 18^2
d^2 = 1521 + 400 + 324
d^2 = 2245
d ≈ √2245
d ≈ 47.4 inches

Therefore, the length of d rounded to the nearest tenth is 47.4 inches.