Question

1. what is the actual height of the door? scale: 1 in. = 2.5 ft. 2.5 in.

Explanation:

Step1: Identify the scale - factor relationship

The scale is 1 in. = 2.5 ft.

Step2: Multiply the model height by the scale - factor

The model height of the door is 2.5 in. So the actual height $h$ is $h=2.5\times2.5$ ft.
$h = 6.25$ ft

Answer:

6.25 ft