Name: ____________________
1.
Unit 4 Investigation 3---Practice Quiz
The table below shows the medal count of four
countries at the 2012 Summer Olympics. Use the data
to complete each statement.
a. The ratio of United States gold medals to Australia
gold medals was about
_____ to _______.
b. Australia had about ______ as many total medals as the Russian Federation. (write as a
decimal)
c. About _____% of the United States’ total medals were gold. (ratio, then percent)
2. There are 48 pretzels in a 12-ounce bag of chocolate-covered pretzels.
a. Write and solve a proportion that you can use the find the number of chocolate covered
pretzels in an 8-ounce bag.
Proportion:
Answer: __________
b. What is the number of chocolate-covered pretzels per ounce?
c. How many ounces does each pretzel weigh?
3. Many US employees received a 4% raise in 2013. Suppose an employee made $24,000 in
2012 and received a 4% raise. What did she make in 2013? Show two different ways to
answer the question.
Work:
Answer: __________________
4. The local Farm Market sells peppers at five for $1.75.
a. Complete the rate table.
b. How many peppers could you buy for $25?
c. Name the unit rate:
d. Write an equation that relates the number of peppers, n, and the cost C.
e. What is the constant of proportionality? _________
f. How do you know?
5. Danielle wants to paint her daughter’s room pink. She has been told two different plans:
*Plan A: Use 3 parts white and 2 parts red
* Plan B: Use 5 parts white and 3 part red
Which plan will give her paint that is the least red? ________________
Explain what the numbers in your calculations mean.
6. The train ride at the zoo covers a distance of 2 miles in 1/4 of an hour.
a. How many miles per hour does the train go?
b. How far can the train travel in 4 hours?
Name: _KEY_
Unit 4 Investigation 3---Practice Quiz
1. The table below shows the medal count of four
countries at the 2012 Summer Olympics. Use the data
to complete each statement.
d. The ratio of United States gold medals to Australia
gold medals was about
__6.6___ to __1_.
e.
46
7
𝑥
=1
35
Australia had about__82___ as many total medals as the Russian Federation. (write as a
decimal)
f. About __44%___% of the United States’ total medals were gold. (ratio, then percent)
2. There are 48 pretzels in a 12-ounce bag of chocolate-covered pretzels.
a. Write and solve a proportion that you can use the find the number of chocolate covered
pretzels in an 8-ounce bag.
Proportion:
48𝑝𝑟𝑒𝑡𝑧𝑒𝑙
12𝑜𝑢𝑛𝑐𝑒𝑠
𝑥
Answer: __32 oz_____
=8
b. What is the number of chocolate-covered pretzels per ounce? 4 pretzels per ounce
c. How many ounces does each pretzel weigh? .25oz for each pretzel
3. Many US employees received a 4% raise in 2013. Suppose an employee made $24,000 in
2012 and received a 4% raise. What did she make in 2013? Show two different ways to
answer the question.
Work:
24000
100%
𝑥
= 104%
or you can multiply by 4% and add that to the salary Answer: $24,960
4. The local Farm Market sells peppers at five for $1.75.
a. Complete the rate table.
# Peppers 1
2
3
4
5
cost
.35
.70
1.05
1.40
1.75
b. How many peppers could you buy for $25? 71 peppers
c. Name the unit rate: The unit rate is .35
10
3.50
15
5.25
20
7.00
100
35.00
d. Write an equation that relates the number of peppers, n, and the cost C. C=.35n
e. What is the constant of proportionality? __.35_______
f. How do you know? It’s the same as the unit rate, or it is the number that is multiplied
5. Danielle wants to paint her daughter’s room pink. She has been told two different plans:
*Plan A: Use 3 parts white and 2 parts red
* Plan B: Use 5 parts white and 3 part red
Which plan will give her paint that is the least red? ____Plan B________
Explain what the numbers in your calculations mean. Make a ratio for each plan, divide
and compart the decimals, make sure you know what each decimal means
6. The train ride at the zoo covers a distance of 2 miles in 1/4 of an hour.
a. How many miles per hour does the train go? 8 miles per hour
b. How far can the train travel in 4 hours? 32 miles