Answer:
Step-by-step explanation:
To be perpendicular m1(m2)=-1
-1m/7=-1
m=7
So the perpendicular line will have 7 as the linear coefficient
y=7x+b
9 ft
its volume is equal to the area by height;
(2.5 x 3)h = 67.5
h = 9ft
1/5 ÷ 1/10 = 10/5