4 - 21 15/16 4-21 MATH 7 Warm up week twenty-one
Some questions (c) 2015 by Certica.
Some questions (c) 2015 by Region 10 Educational Service Center.
Some questions (c) 2015 by TEKS Resource System.
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1
A circle with Radius r is divided into 8 congruent sections. The 8 sections are arranged as
shown below, with l representing the length of the segments and w representing the width
of the segments.
The circle is then divided into 16 congruent sections, and the sections are arranged as
shown. As the circle is divided into more and more congruent sections, which statement is
true?
A The length gets closer to and the width gets closer to
B The length gets closer to
C
and the width gets closer to r.
The length gets closer to
and the width gets closer to r.
D The length gets closer to
and the width gets closer to 2r.
2 Find the diameter of the circular garden
whose circumference is 124.03 cm.
F
19.75 cm
A circle has a radius of 2 feet.
What is the circumference of the
circle? (Use G
39.5 cm
A 4 ft
H 29.5 cm
B 8 ft
J
C
39.75 cm
3
12.56 ft
D 14.65 ft
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4 Which expression represents the
area of the circle shown below?
6 Breanna made a scale drawing of her
bedroom in order to rearrange her
furniture. She uses a scale of 1/2 in. = 1
foot. Her bed is 4 1/2 feet by 6 feet.
What scale dimensions represent her
bed?
F
2 1/4 in. by 3 in.
G
3 in. by in.
H in. by 6 in.
J
F
square centimeters
G
square centimeters
H
square centimeters
J
5
9 in. by 12 in.
square centimeters
Jared is going to plant 20 small plants
around the edge of a circular garden that
is 8 feet in diameter. If he spaces the plants evenly, how
much distance will be between the
plants?
A 25.12 feet
7
Julie was looking at the architect's
blueprint for her house. She knows that
the dimensions of her bedroom are to be
12 feet by 16 feet. The scale on the
blueprint of the house is inch = 1 foot.
What are the blueprint dimensions of
her bedroom?
A 6 inches by 8 inches
B 8 inches by 12 inches
C
3 inches by 4 inches
D 48 inches by 64 inches
B 12.56 feet
C
2.5 feet
D 1.26 feet
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8 Janet measured the number of fluid ounces of water in a container after being left outdoors
for a week. The changes in the number of fluid ounces of water in the container in relation to
the original amount are displayed below.
Water Measure Changes
Day
Change
in fluid
ounces
MondayTuesdayWednesdayThursdayFridaySaturdaySunday
–
–
-
–1
Find the average change in the amount of water in the container after being left outdoors
for a week.
F
5 1/2 fluid ounces
G
11/14 fluid ounces
H –2 1/10 fluid ounces
J
–3/10 fluid ounces
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9 The data in the table was taken from a family budget estimator for a one-parent family with
two children living in Dallas, Texas.
In a one-parent family with two children living in Dallas, the father works 40 hours per
week. Assuming a month has four weeks, which equation can be used to determine w, the
father’s minimum hourly wage be to meet the family’s estimated minimum monthly
budget?
A w = 5695 ÷ 4
B w = 5695 ÷ 40
C
w = 5695 ÷ 40 ÷ 4
D w = 5695 ÷ 40 ÷ 5
10
What is the relationship between the
volume of a square pyramid and the
volume of a cube if they both have the
same area of the base and the same
height?
F
The pyramid is half the size of the
cube.
G
The pyramid is one-third the size
of the cube.
H The cube is one-third the size of
the pyramid.
J
The cube is four times larger than
the pyramid.
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