Suppose tuna is on sale for $0.90 a can, and you have a coupon for $0.40 off your total purchase. write a function rule for the cost of n cans of tuna.

a. c(n) = 0.09n- 0.40
b. c(n) = 0.40n - 0.90
c. c(n) = (0.90 + n) - 0.40
d. c(n) = (0.40 + n) - 0.90

Hence, Option 'A' is correct.

Step-by-step explanation:

since we have given that

Cost of per cans = $0.90

Let number of cans of Tuna be n

so, Total cost of n cans be

Amount of coupon Tuna get off on total purchase = $0.40

So, According to question,

Hence, Option 'A' is correct.