Final answer:
The total monthly cost M that Jake pays for using the company's service is expressed as the equation M = 25 + 0.04t, where t represents the total minutes of usage.
Step-by-step explanation:
The cost model for Jake's usage of the company's service is based on a monthly charge plus a variable charge for each minute of usage. We can express the total monthly cost, M, as a function of the total number of minutes used, t. The company charges a flat rate of $25 each month plus $0.04 for each minute of usage. Therefore, the cost equation can be written as:
M = 25 + 0.04t
This equation means that for every minute Jake uses, $0.04 is added to the base cost of $25. The variable M represents the total monthly cost, and t represents the total number of minutes of usage.