a) Approximate the area under graph (a) of f(x) =3/x" over the interval [1,9] by computing the area of each rectangle to four decimal places and then adding b) Approximate the area under graph (b) of f(x) = 3/ x over the interval [1,9] by computing the area of each rectangle to four decimal places and then adding. + The area under graph (a) is approximately 3- (a) 1.5 (Round to four decimal places as needed.) X 3 9 (b) 1.5 X 6 8A coffee company has found that the marginal cost, in dollars per pound, of the coffee it roasts is represented by the function below, where x is the number of pounds of coffee roasted. Find the total cost of roasting 90 lb of coffee, disregarding any fixed costs. C'(x) = - 0.027x + 4.25, for x s 100 The total cost is $ (Round to the nearest cent as needed.)a) Approximate the area under graph (a) of f(x) = 3/x over the interval [1,9] by computing the area of each rectangle to four decimal places and then adding b) Approximate the area under graph (b) of f(x) - 3/ x over the interval [1,9] by computing the area of each rectangle to four decimal places and then adding 3 Ty The area under graph (a) is approximately (a) 1.5- 9 (Round to four decimal places as needed.) 3 5 ce Lib 9 3- (b) ources 1.5- ons 2 3 5 6 8 9 n Tool