Solve the proportion 100/x=75/6

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

When the ball has traveled a distance of

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?