An amusement park opens at 9.30 am This morning the parking lot for the amusement park opened at 8 00 am 9.00 am there were 141 cars in the parking lot The parking attendants noticed that every half hour between am and am the number of cars in the parking lot tripled What type of function appropriately models this situation?
A. Linear Decay
B. Exponential Growth
C. Exponential Decay
D. Linear Growth

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?