Respuesta :

Answer:

the answer is H=3 miles

Step-by-step explanation:

Area of Trapezoid = [tex]{(Base1+Base2)/2 }* (Height)[/tex]

we sub the values we have in the formula:

18= ( 5+7)/2 * (H)

H = (2*18)/(5+7)

H = 3 miles

where is H is the Height