Answer the question. See Example and the Problem-Solving Hint preceding Example.
EXAMPLE Using Percents to Find Percentages
(a) How much pure alcohol
is in 70 L of a 20%
alcohol solution?
(b) Find the annual simple
interest if $3200 is
invested at 2%.
EXAMPLE Solving a Motion Problem
Two cars leave a parking lot at the same time, one travelling east and the other travelling west. The westbound car travels 6 mph faster than the eastbound car. In hr, they are 35 mi apart. What are their rates?
What is the monetary value of 283 nickels?
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