2. Your company orders a load of rock salt at a price of $85 per ton. There is a delivery charge of $95 and sales tax of 7%.

Question

a. Explain what the function d(x) 85x + 95 represents.

b. Write a function c(x) for the total cost of an amount of x dollars with a 7% tax added

c. Find and interpret (de)(x) and (e-d)(x) d. There is no tax on the delivery fee. Find your company's total cost for 13 tons of salt

d. There is no tax on the delivery fee. Find your company's total cost for 13 tons of salt.​

Answer 1

85x + 95 = the pretax cost of x tons of salt rock

c(x) = 1.07(85x + 95) = the post tax cost of x tons of salt rock

but if no tax on the delivery fee,

then c(x) = 1.07(85x) + 95

c(13) = 1.07(85)(13) + 95

= cost for 13 tons