Question

a = \frac{1}{2}bh
what are the actual base and height of the trampoline?
actual base = ? ft
actual height = ? ft
1 in. = 4 ft

Explanation:

Step1: Convert base length

Given 1 in = 4 ft, base on - drawing is 2.5 in. So actual base $b = 2.5\times4$.
$b=2.5\times4 = 10$ ft

Step2: Convert height length

Height on - drawing is 3 in. So actual height $h = 3\times4$.
$h = 3\times4=12$ ft

Answer:

Actual base = 10 ft
Actual height = 12 ft