Https://www.ecmweb.com/national-electrical-code/code-basics/article/20886603/dwelling-unit-calculations
Answer:
7.5 gallons
Step-by-step explanation:
3 x 250/100
= 7.5
a peculiar thing about the centroid of a triangle, is that it cuts all the medians in a 2:1 ratio, so JP : PM are on a 2:1 ratio, thus

Factoring the common factor (n-3) from the terms on the left side, that left-side expression becomes
(2n^2-4)(n-3)
We presume your missing factor is
(2n^2-4)
The answer is a. here’s a picture that hopefully helps explain the reasoning/work