Find the perimeter and area of this rectangle

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)

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?