ratios and rates
6 bowls of cereal to 20 pancakes (simplest form)
3:10
are these a proportion:
4/10 = 32/72
no
On a map with a scale of 0.25 inch = 30 miles,
the distance b e t w e e n two cities is 8.3 inches.
Find the actual distance between the cities.
996mi
Find 15% of 30.
4.5
4 years to 8 months (simplest form)
6:1
are these a proportion:
40/25= 32/20
yes
double points:
A model of a skyscraper uses the scale of 2
inches = 45 feet. If the actual skyscraper is 992
feet tall, how tall is the model?
44.0888...ft
What is 65% of 175?
113.75
152 cherries to 16 jars (simplest form)
19:2
15/45=9/c
c=27
Give the scale factor of Figure A to Figure B. see white board.
3/2
Andrew took a math test with 40 questions. If
he scored an 85%, how many questions did he
get correct?
34 questions
after running 5 miles, Kevins total time was 42 minutes. Find his time per minute. Round to the nearest thousandth.
.119 miles/ min
16/120=v/15
v=2
Give the scale factor of Figure B to Figure A.
2/3
A certain laptop is really popular and sells for
$209. Since sales are so good, the store raises
the price by 12%. What is the cost of the
laptop after the markup?
$234.08
Nellie purchased 6.5 pounds of strawberries for $12.87. Calculate the cost of a single pound. Round to the nearest cent if necessary.
$1.98/pound
x/12=15/40
x=4.5
A telephone pole is 45 feet and casts a 20 foot shadow. A street lamp next to the telephone pole casts a 12 foot shadow. Calculate the height of the street lamp.
27 ft
Nina buys a $59.99 video g a m e on sale for
15% off. She then uses a coupon that takes
20% off the sale price. If sales tax is 7%, how much
did she pay in total?
$43.65