Question

The cost of calling Nogales is $1.12 for the first 3 minutes and 52¢ for each additional minute, what would be the cost of a 10-minute call?

Answer 1

So we know that the first 3 minutes out of the 10 minutes call to Nogales is `$1.12` as stated in the information provided.

The remaining 7 minutes cost `0.52` each which means we need to multiply 7 by 0.52 like this:

`0.52*7=3.64`

Now we add it to `1.12` like this:

`3.64+1.12=4.76`

Our final answer is that it cost `$4.76` to make a 10 minute call to Nogales.

Answer 2

$4.76

Explanation:

Let's write an expression to calculate the cost:

`C=1.12+0.52(m-3)`

Where `C` is the cost, and `m` is the number of minutes. We subtract 3 because the first 3 minutes of talk is covered by the initial cost. We can now plug in our time (10 minutes) to calculate the cost:

`C=1.12+0.52(color(blue)(10)-3)`

`C=1.12+0.52(7)`

`C=1.12+3.64`

`color(green)(C=4.76`