Red Plains Roasting has found that the cost in dollars per p

Red Plains Roasting has found that the cost, in dollars per pound, of the peanuts it roasts, is c(x) = -0.015x + 7.50, for x 500, where x is the number of pounds of peanuts roasted. Find the total cost of roasting 300 lb of peanuts.

A)$3150.00

B)$3.00

C)$5.25

D)$1575.0

Solution

c(x) = -0.015x + 7.50, for x 500, where x is the number of pounds of peanuts roasted

x = 300lb :plug x = 300lb in c(x)

c(300) = -0.015(300) +7.50

= $ 3.00

Option B