A circular running track is 1/4 mile long. Elena runs on this track, completing each lap in 1/20 of an hour. What is Elena’s running speed? Explain your thinking

Step-by-step explanation:

Elena's running speed is 5 miles/hour

Explanation:

The speed is defined as the covered distance per unit time

In the problem, we have:

The distance covered is the length (circumference) of the circular track which is given as  of a mile.

We are also given that she completes each lap (she completes  of a mile) in  of an hour

To get her speed, we will divide the distance covered by the time taken to cover this distance

This is done as follows:

speed =  miles/hour

This means that:

Elena can run 5 miles each hour

Hope this helps :)

costs the what? what is the cost of the pants?

step-by-step explanation:

if it is $10, then the price is 14.

take 40% of the cost, and then add the cost.

40% of 10 = 4

4+10 = 14.