Select the correct answer from each drop-down menu. A cell phone company’s profit is modeled by the function p(x) = − x2 + 10x − 1, where p is expressed in thousands of dollars and x is the number of phones sold in hundreds. The company has to make between to phones to make a profit of at least $15,000.

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