Question 1 the percent of sales tax is 6%. What is the sales tax on a stakeboard that costs $98 ?

Question 2 the price of your favorite brand of jeans was $28 last month. This month the price is $35. What is the percent of change from last month to this month?

Question 3 How long will it take $500 to double at a simple interest rate of 5% ?

Nerd123 Jan 30, 2018

#1**+1 **

1. Sales Tax = Just multiply 98 by .06

2. Pct Change =

[ ( New Price - Old Price ) / Old Price x 100 ] % =

[ (35 - 28) / 28 x 100 ] % =

[ 7 / 28 x 100 ] % =

[ 1/4 x 100 ] % =

25%

3. We want to find this

1000 = 500 * .05 * t simplify

1000 = 25 * t divide both sides by 25

40 = t = 40 years

BTW..... surprising fact....the time to double any amount at 5% would be the same !!

CPhill Jan 30, 2018