Name ______________________________
Period _______
Pre-Algebra Daze 4
Due: September 23, 2015
Write a proportion (be sure to label) and cross-product equation for each situation. Then, answer the
question.
Situation
1. Enrique can eat 10 hot
dogs in 5 minutes. How
many hot dogs will he
be able to eat in 40
minutes?
2. Carson swam 2 laps in
30 seconds. How long
will it take him to swim
15 laps?
3. The ratio of boys to
girls is 4 to 3. How
many boys are there if
there are 440 girls?
4. Dr. Payne sees 3
patients per hour. How
many patients does she
see in 8 hours?
5. A 20 foot tall tree casts
a 12 foot shadow. How
long is the shadow of a
6 foot man?
Proportion
Cross-Product Equation
Solution
Each table below represents a proportional relationship. Write the y = kx equation for each table.
6.
7.
x
y
4
y
x
8.
x
y
3
5
8
6
12
16
y
x
9.
x
y
20
1
10
40
9
15
12
20
Equation: _____________
y
x
x
y
2
2
-1
2
4
4
-2
60
3
6
6
-3
80
4
8
8
-4
Equation: _____________
Equation: _____________
y
x
Equation: _____________
Answer the questions below.
10.
Four students are working on an assignment in class. Mike has completed
1
9
of the assignment, Gwen has
completed 11% of the assignment, Jorge has completed 0.12 of the assignment, and Tai has completed
assignment. Who has completed the most?
9
15
11.
Which fraction in the grouping is NOT equivalent to the others?
15
20
27
36
21
28
6
8
36
48
1
8
of the
The Earth is 2.4 x 105 miles from the moon and 9.3 x 107 miles from the sun. How much further is the Earth
from the sun than the moon?
12.
13.
The diameter of a grain of sand is 2.4 x 10-3 inches. Write this in standard notation.
14.
The population of the world is about 7,000,000,000 people. Express the number in scientific notation.
15.
Write the following numbers in descending order: - 8, 0.24, -2.23, 97%, -2 5, -0.95
16.
What is √64 − ?
5
2
5
2
Harley earned $80 babysitting last weekend. She spent half of it on shoes and bought 2 tank tops priced at $8
each. How much of the $80 does Harley have remaining?
17.
Pierson paid $6.60 for a dozen doughnuts. If each doughnut cost the same amount, how much was each
doughnut?
18.