Answer:
11 ft
Step-by-step explanation:
The area of a trapezoid is given as:
A = ½(a + b)h
Where a = length of one base of the trapezoid = 15 ft
b = length of the second base of th trapezoid
h = height of the trapezoid = 7.6 ft
When the area is 98.8 ft², the length of the second base will be:
98.8 = ½(a + 15) * 7.6
2 * 98.8 = (a + 15) * 7.6
197.6 / 7.6 = (a + 15)
26 = (a + 15)
=> a = 26 - 15 = 11 ft
The length of the second base if the trapezoid is 11 ft.
