David is building a play area for his kids. They are learning their shapes and he wants it to be an isosceles triangle with base b and height h. He is restricted to dimensions such that b + h = 25. What is the maximum area of the triangle?
A. A = 67.5

B. A = 86.125

C. A = 79.5

D. A = 78.125

5x+10 is the correct one

hope this

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