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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?

Guest Sep 21, 2017
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 #1
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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

 

2.)1200*.03*4= 144$

 

3.)4.50*.40 then do 4.50+1.80= $6.30

 

4.)150*.55*4=$330 earned

 

I might be wrong with these so other people reply to correct me please so I can correct it!

NediaMaster  Sep 21, 2017
edited by NediaMaster  Sep 21, 2017
 #2
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Thank you! 

Guest Sep 21, 2017
 #3
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No problem!

NediaMaster  Sep 21, 2017
 #4
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All look fine except for No. 4:

4)

 

$150 x 0.055 x 4 =$33.00 interest earned over 4 years.

Guest Sep 21, 2017
edited by Guest  Sep 21, 2017

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