At the Chicago museum of science, there is an exhibit that shows a scale model of Chicago with trains running through the city. The scale on model says that every 3 inches on the model is equal to 8 feet in real life. One car of an "L" train in real-life is 36 feet long. What will be the length of the model of an "L" train if the train has 5 cars that are connected?

f is the midpoint of

answer: the resulting cross section is a rectangle. solution: a plane parallel to the base of a triangular prism will intersect a cross section that is the same shape as its bases. so the cross section is a triangle.

step-by-step explanation:

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).