What is it called when you have two burgers but one of them is half?

In the surface area formula for cylinders which expressionrepresents the lateral area

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Aboat's value over time is given as the function f(x) and graphed below. use a(x) = 400(b)x + 0 as the parent function. which graph shows the boat's value increasing at a rate of 25% per year?