Question

Please help me with this

Answer 1

Explanation:

a. area of shaded region= area of rectangle -area of triangle

area= (17*14)-(1/2*8.7*9.5.sin72)

= 159.4m²

b.20l cover 20m²

so 159.4l would cover 159.4m²

20m²-->(cost)$ 21.99

159.4-->?

(21.99*169.4)÷20

=$175.3