Question

Tom purchased international calling cards before traveling abroad. He bought a 60-minute card for $9.99, a 90-minute card for $14.29, a 100-minute card for $17.99, and a 200-minute card for $29.49. After using all of his calling cards, Tom used his mobile phone for 38 minutes at a rate of $2.99/minute.

Answer 1

The amount spent on calls per minute is an illustration of unit rates.

The amount spent on the 38-minute call is $113.62

The given parameters are:

$\mathbf{Rate = \ 2.99/minute}$

$\mathbf{Time = 38\ minutes}$

So, the amount spent on call is:

$\mathbf{Amount = Rate \times Time}$

This gives

$\mathbf{Amount = \ 2.99/minute \times 38\ minutes}$

Cancel out minutes

$\mathbf{Amount = \ 2.99 \times 38}$

$\mathbf{Amount = \ 113.62}$

Hence, the amount spent on the 38-minute call is $113.62

Read more about unit rates at:

brainly.com/question/18065083