Write each rate as a unit rate.See Example 9.
- 12 errors in 8 hours
- 114 times in a 12-month period
- 4,007,500 people living in 12,500 square
miles - 117.6 pounds of pressure on 8 square
inches
Find the unit price of each item.See Example 10.
- They charged $48 for 12 minutes.
- 150 barrels cost $4,950.
- Four sold for $272.
- 7,020 pesos will buy six tickets.
- 65 ounces sell for 78 cents.
- For 7 dozen, you will pay $10.15.
- $3.50 for 50 feet
- $4 billion over a 5-month span
- GEAR RATIOS Refer to the illustration below.
a. Write the ratio of the number of teeth of the
smaller gear to the number of teeth of the larger
gear in simplest form.
b. Write the ratio of the number of teeth of the
larger gear to the number of teeth of the smaller
gear in simplest form.- CARDS The suit of hearts from a deck of playing
cards is shown below. What is the ratio of the number
of face cards to the total number of cards in the suit?
(Hint:A face card is a Jack, Queen, or King.)
APPLICATIONS
- SKIN Refer to the cross-section of human skin
shown below. Write the ratio of the thickness of
the stratum corneum to the thickness of the dermis
in simplest form. (Source:Philips Research
Laboratories) - PAINTING A 9.5-mil thick coat of fireproof paint is
applied with a roller to a wall. (A milis a unit of
measure equal to 1/1,000 of an inch.) The coating
dries to a thickness of 5.7 mils. Write the ratio of the
thickness of the coating when wet to the thickness
when dry in simplest form. - BAKING A recipe for sourdough bread calls for
cups of all-purpose flour and cups of water.
Write the ratio of flour to water in simplest form. - DESSERTS Refer to the recipe card shown below.
Write the ratio of milk to sugar in simplest form.
Frozen Chocolate Slush
(Serves 8)(^1) –
2
(^1) –
2
Once frozen, this chocolate can be cut into cubes and stored
in sealed plastic bags for a spur-of-the-moment dessert.
cup Dutch cocoa powder, sifted
cups sugar
3 cups skim milk
(^1) –
(^12)
(^5 141 34)
Stratum corneum
(thickness 0.02 mm)
Living epidermis
(thickness 0.13 mm)
Dermis
(thickness 1.1 mm)
Subcutaneous fat
(thickness 1.2 mm)
5.1 Ratios 425