Will give ! a local high school has 1250 students in grades 9 through 12. twenty-eight percent of the students in the school are in the ninth grade. one-half of the ninth-grade students ride the bus to school. how many ninth-grade students ride the bus?

First you need to find 28% of 1250 by

350

With that answer, you calculate

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