Question

what are the actual base and height of the trampoline? actual base = actual height = 12 ft a = 1/2bh 1 in.:4 ft 2.5 in. 3 in.

Explanation:

Step1: Use the scale - factor to find actual base

Given scale is 1 in. : 4 ft. The base on the drawing is 3 in. Multiply the drawing - base by the scale factor.
$3\times4 = 12$ ft

Step2: Use the scale - factor to find actual height

The height on the drawing is 2.5 in. Multiply the drawing - height by the scale factor.
$2.5\times4=10$ ft

Answer:

Actual base = 12 ft, Actual height = 10 ft