Please answer all the following questions: 1.) if the regular price of a new T - shirt is $13.95 and the sale pric is $10.00, find the percent of decrease to the nearest whole percent.

Find the total cost or sale price to the nearest cent.
2.) $14.95 dinner; 15% tip 18

3.) $27.99 shoes: 7 1/2% tax 19

4.) $16.99 cap; 20% discount 20

5.) $25.00 game ticket; 5.5% tax 21

Find the simple interest paid to the nearest cent for each principal, interest rate, and time.

6.) $2,620, 3% 5 years

7.) $152, 2.5%, 18 monts

8.) $72.80, 4 1/4%, 2 years