Question

a company charges $45 to rent equipment and an additional $10 per day. write the equation for the total cost c for d days of rental. a. $c = 10 - 45d$ b. $c = 45d + 10$ c. $c = 55d$ d. $c = 45 + 10d$

Explanation:

Step1: Identify fixed cost

Fixed cost is $45 (one-time rental charge).

Step2: Identify variable cost

Variable cost is $10 per day, so for \( d \) days it is \( 10d \).

Step3: Total cost equation

Total cost \( C \) = fixed cost + variable cost, so \( C = 45 + 10d \).

Answer:

d. \( C = 45 + 10d \)