help pleaseee

1. A tank can hold 42 liters of water. Water is pouring into the tank at a rate of 9 liters per minute. How many minutes will it take to fill the tank? Write an equation that represents this situation and solve.


2. Janie paid $105.38 at the store, including $6.39 in taxes and $28 worth of nontaxable items. What was the sales tax rate? Round to the nearest whole percent.


3. Tina has $60 to spend on craft supplies. The tax rate is 8.25%. What is the maximum amount she can spend on craft supplies before taxes?