Can someone plz help me with my whole homework? 1.The original price is $20. The Percent of Discount is 20%. What is the sale price?

2.The original price is $95. The Percent of Discount is 35%. What is the sale price?

3.The Percent of Discount is 75%. The sale price is $55.50. What is the original price?

4.The Percent of Discount is 40%. The sale price is $78. What is the original price?

5.Find the selling price. The cost to store: $20. The markup: 15%.

6.Find the selling price. The cost to store: $56. The markup: 80%.

7.Find the selling price. The cost to store: $110. The markup: 140%.

8.A store buys an item for $10. To earn a profit of $25, what percent does the store need to markup the item?

9.An account earns simple interest. Find the interest earned.
$400 at 7% for 3 years

10.An account earns simple interest. Find the balance of the account.
$400 at 7% for 3 years

11.An account earns simple interest. Find the interest earned.
$1200 at 5.6% for 4 years

12.An account earns simple interest. Find the balance of the account.
$1200 at 5.6% for 4 years

13.Find the annual interest rate.
I = $18, P = $200, t = 18 months

14.Find the annual interest rate.
I = $310, P = $1000, t = 5 years

15.Find the amount of time.
I = $60, P = $750, r = 4%

16.Find the amount of time.
I = $825, P = $72500, r = 5.5%

17.You put $500 in a savings account. The account earns $15.75 simple interest in 6 months. What is the annual interest rate?