Question

1. the equation for a subscription service where the initial joining fee is $25 and the monthly fee is $10 is represented by the total cost t after m months as

a. $t = 10m + 25$
b. $t = 10 + 25m$
c. $t = 25m + 10$
d. $t = 25 - 10m$

Explanation:

Step1: Identify fixed and variable costs

Fixed cost: $25 (one-time joining fee). Variable cost: $10 per month.

Step2: Form total cost equation

Total cost \( T = \text{variable cost} + \text{fixed cost} = 10m + 25 \)

Answer:

a. \( T = 10m + 25 \)