Question

Donna runs each lap in 4 minutes. She will run less than 20 minutes today.What are the possible numbers of laps she will run today?Use n for the number of laps she will run today.Write your answer as an inequality solved for n .

Answer 1

Let the amount of laps she will run today be n. If Donna runs each lap in 4 minutes, the total minutes used to run n laps each minute will be 4n.]

Since she will run less than 20 minutes today, the inequality expression for the statement will be:

`4n<20`

To get the value of n, we will divide both sides of the inequality by 4 as shown:

`\begin{gathered} (4n)/(4)<(20)/(4) \\ n<5 \end{gathered}`

Hence the maximum number of laps she will run per day is 4

Note that the maximum value is 4 because n is less than 5