What is the volume for this picture

1. are the triangles similar and if so why? what is the value of x? show your work.

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?

One positive integer is 2 less than another. the product of the two integers is 24. what are the integers