Review Chapters 2 & 3
Topics:
Unit Conversions
Percent of
Percent more or less than
Percent increase or decrease
Absolute and relative change
Absolute and relative difference
Scientific Notation
Putting numbers into perspective
Types of Errors
Size of Errors
Precision vs Accuracy
Index & CPI
1.
1.
Gi
iven that 1 meter equals 1.094 yards, convert a 5 kilometer race into miles.
.
2.
2.
All the gold ever mined in the world would fit into a 60 foot cube. How many cubic
inches is this?
3.
3.
Suppose you traveled 400 miles on one tank of gas. You paid $2.25 per gallon, and your tank
needed 15 gallons of gas. How much did you spend for gas per mile?
4.
4.
When you arrived in Paris, you exchanged 200 dollars for 125 euros. What is the
exchange rate? You spent all but 12 euros. How many dollars will you get when you
exchange back?
5.
5.
Complete the table:
fraction decimal percent
25
.7
2.5
6.
6.
Chevron stock rose form 90 to 95 last week. What is the absolute change? What is
the relative change?
7.
7.
Microsoft stock rose form 25 to 27 last week. Compare this to the change in
Chevron.
8.
8.
A new outfit was marked down by 20% and then put on sale for another 50% off.
After 5% sales tax, the final cost was $25.20. What was the original price?
9.
9.
If the Cardinals win 105 out of 162 games, what is their winning percentage?
