Answer:
111.2 units³
Step-by-step explanation:
Base area = 2(a² + ½ab)
2(4)² + (4)(5.9)
= 55.6 units²
Volume = Base area × c
55.6 × 2
= 111.2 units³
B
The slope is increasing between those 2 points
642 ÷ 36 = 17.8
so 17 boxes
17* 36 = 612 642-612 = 30
30 umbrellas were left