Kevin's company makes solid balls out of scrap metal for various industrial uses. His current task is to make a batch of aluminum balls with radius 4.5 in. If he has a total of 76,302 in^3 of aluminum, how many balls can he make?

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?