Question

Brenna has already spent 69 minutes on the phone, and she expects to spend 1 more

minute with every phone call she routes. In all, how many phone calls does Brenna have to
route to spend a total of 88 minutes on the phone?

Answer 1

Brenna has to route 19 phone calls to spend a total of 88 minutes on the phone

Explanation:

The time Brenna has already spent on phone = 69 minutes.

Total time she is to spend on the phone = 88 minutes

So, the minutes left yet = 88 minutes- 69 minutes

= 19 minutes

Now, for each calls she routes, she spends 1 minute extra.

So, in 19 minutes duration she can route EXACTLY 19 calls.

Hence, Brenna have to route 19 phone calls to spend a total of 88 minutes on the phone.