Ishi walked a total of 2 1/2 miles on a treadmill. He walked at a constant rate of 4 miles per hour. Which expression shows how long, in minutes, Ishi walked on the treadmill? A. 2.5 miles divided by 4 miles/hour divided by 60 minutes/ hour B. 2.5 miles divided by 4 miles/ hour x 60 minutes / hour C. 2.5 miles x 60 minutes/ hour D. 2.5 miles x 4 miles/hour divided by 60 minutes/hour

5 x 14?

im new, sorry if this is wrong.

step-by-step explanation:

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

you can use a^2+ b^2=c^2