Answer:
56
Explanation:
by the formula at the bottom, it would be 1/2h(b1 + b2)
so h = height and the height is 7 feet. 1/2 of 7 feet is 3.5
b1 would be 12 feet, and b2 would be 4 feet. so first let’s do the (. )
12 + 4 = 16
now the problem is 3.5(16)
3.5 x 16 = 56
now i just went off the formula, but i think that’s right. good luck!