2-10 Solve It!
Two stores advertise sales on their Web sites, as shown below. Before
the sale, each sweater cost $35. Which store offers the better deal?
How do you know?
You have to
understand
percents to shop
for a good deal.
Men’s Sweater
$5 off
Men’s
Sweater
Colors
Size:
XL
15% off
Color:
Qty.:
1
ADD TO CART
Size:
XL
Qty.:
1
BUY NOW
2-10 Lesson Quiz
1. In 1990, the price of a gallon of unleaded gasoline was
$1.37. In 1998 it was $1.02 per gallon. What is the decrease
expressed as a percent change?
2. In mid-2008, the price of a gallon of unleaded gasoline
was $4.02. In 1990 it was only $1.37 per gallon. What is the
increase expressed as a percent change?
3. A student’s scale recorded his weight as 160 lb. His weight is
actually 164 lb. What is the percent error of the scale?
4. Do you UNDERSTAND? The heaviest land animal ever
recorded (according to the Guinness Book of World Records)
was a male African bush elephant. He weighed 13.5 tons
measured to the nearest half ton. How would you find the
elephant’s minimum and maximum possible weights?
0144_hsm11a1se_0210.indd 144
Answers
Lesson Quiz
Solve It!
The store that offers 15% off;
explanations may vary.
1. about 25.5%
2. about 193%
3. about 2.5%
4. Answers may vary. Sample:
Subtract and add 0.25 ton
from 13.5 tons.
Prentice Hall Algebra 1 • Solve It/Lesson Quiz on Transparencies
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