40 years if the rate stays the same
You’re answer would be 0=0
The answer is C. Hope this helps! :)
Answer:
Step-by-step explanation:

Hi, thank you for posting your question here at Brainly.
This is a common work problem in Algebra. To solve this, the general form of the equation would be:

let A denote you and B denote your classmate. Substituting,

It would take about 2.4 days for the both of you to complete the calls.