1. A tennis racket normally cost $65. The tennis racket is on sale for 20% off. What is the sale price of the tennis racket?
2. You deposit $1200 in a savings account that earns simple interest at a rate of 3% per year. How much interest will you have earned after 4 years?
3. A beauty salon buys bottles of styling gel for $4.50 per bottle and marks up the price by 40%. For what price does the salon sell each bottle?
4. You deposit $150 in a savings account that earns simple interest at a rate of 5.5% per year. How much interest will you have earned after 4 years?
The equation you would use is I= P( Money started with) * r(Percent in decimal form) * t(Time in years) for the intrest questions
The equations you would use for the sale questions is (money * percent in decimal=x) then do (money-x) for sale or (money+x) for markup
1.) 65*.2= 13, then do 65-13= $52
3.)4.50*.40 then do 4.50+1.80= $6.30
I might be wrong with these so other people reply to correct me please so I can correct it!