Transcript are you smarter than an 8th grade math student - Mrs-Cook

Are You Smarter
th
Than an 8 Grade Math
Student?
1,000,000
500,000
Are You Smarter Than an
8th Grade Math Student?
300,000
175,000
100,000
Measurement #1
Measurement #2
Probability & Statistics #1 Probability & Statistics #2
50,000
25,000
Geometry & Spatial #1
Geometry & Spatial #2
Patterns & Algebra #1
Patterns & Algebra #2
10,000
5,000
2,000
1,000
Numbers & Operations #1 Number & Operations #2
Measurement #1 Question
A cell-phone tower that has a transmission
range of 50 miles is located 40 miles due south
of a straight road. Find x, the length of the
section of road that is
within the transmission
range of the tower.
A 10 mi
B 30 mi
C 60 mi
D 90 mi
Measurement #1 Answer
2
2
2
30 is half the
a

b

c
C
40  b  50
2
2
2
1600  b  2500
2
b  900
b  30
2
distance. The
total transmission
range is 60 miles.
30  30  60miles
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Measurement #2 Question
To the nearest square inch, what is the area of
pavement with which the surface of the
roller will come into contact in
one complete rotation?
A 753 in2
B 1,507 in2
C 1,708 in2
D 1,909 in2
Measurement #2 Answer
B
Lateral
Surface
Area
S  2rh
S  (2)(3.14)(8)(30)
S  (6.28)( 240)
S  1,507in
2
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Probability & Statistics #1 Question
The results of a random survey showed that
42 out of 80 people plan to vote for Mr. Vu for
city council. Which is the best prediction of the
total number of votes he will receive if 2,000
people vote?
F 25
H 120
G 50
J 1,000
Probability & Statistics #1 Answer
J = 1,000
42
 half
80
1
2000   1000
2
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Probability & Statistics #2 Question
Which description best represents the
relationship of the
dentist’s data?
F Negative trend
G No trend
H Positive trend
J Cannot be determined
Probability & Statistics #2 Answer
F = Negative Trend
The # of cavities
decrease as the patient
gets older.
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Geometry & Spatial #1 Question
Quadrilateral PQRS was dilated to form
quadrilateral WXYZ. Which number best
represents the scale factor used to
change quadrilateral PQRS
into quadrilateral WXYZ?
A 1
B 1
4
C
2
2
D
4
Geometry & Spatial #1 Answer
C = double
Q(2,1)
Q' (2  2,1 2)
Enlargement: X (4,2)
scale factor > 1.
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Geometry & Spatial #2 Question
Which drawing shows
a 3-D view of the
solid figure represented?
A
B
C
D
Geometry & Spatial #2 Answer
A: matches both views
B: extra cube sticking up
C: extra cube sticking out on
bottom
D: Missing one cube on the top
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Patterns & Algebra #1 Question
Mr. Park’s total monthly charge for local and longdistance telephone service, c, can be found using
the equation c = 20 + 0.07m, where m represents
the number of minutes of long-distance calls Mr.
Park made during that month. Find the total
charge for a month during which Mr. Park made
100 minutes of long-distance calls.
F $7.00
G $20.00
H $20.07
J $27.00
Patterns & Algebra #1 Answer
J = $27.00
C  20  .07 m
C  20  .07(100)
C  20  7
C  27
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Patterns & Algebra #2 Question
Vanita can read an average of 18 pages during
a 30-minute reading period at school. At this
rate, approximately how long will it take her
to read a 380-page book?
A 11 h
B 21 h
C 23 h
D 42 h
Patterns & Algebra #2 Answer
A = 11hr
18 pg
380 pg

30 min
x min
18 pg  21
380 pg

30 min  21 630 min
630 min
 10.5hrs
60 min
10.5  11hrs
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Numbers & Operations #1 Question
The area of a square is 125 square meters.
Which best represents the length of a side of
the square?
F 10.8 m
G 11.2 m
H 11.9 m
J 12 m
Numbers & Operations #1 Answer
G = 11.2m
121  125  144
11  125  12
125  11.2
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Numbers & Operations #2 Question
Ms. Gonzalez’s monthly electricity bills for March
through June were $97.09, $103.96, $114.73, and
$121.82. She estimated that the electricity cost a
total of $400.00 over these 4 months. Which best
describes her estimate?
A Less than the actual amount because she
rounded to the nearest $100
B Less than the actual amount because she
rounded to the nearest $10
C More than the actual amount because she
rounded to the nearest $100
D More than the actual amount because she
rounded to the nearest $10
Numbers & Operations #2 Answer
97  100
A = Less than 97  100
the actual
amount 103.96  100 103.96  100
because she
114
.
73

110
114
.
73

100
rounded to
the nearest 121.82  120 121.82  100
$100
 $430best
 $400hers
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Million Dollar Question
Measurement
1,000,000 Question
∆EFG is similar to ∆HJK.
Find the length of JK.
A 3 units
B 7 units
C 14 units
D 24.5 units
1,000,000 Answer
10.5 3.5
B
=
7
units

21
x
1
21 1 21
10.5 



7
3  3.5
1 3 3
1
x
21
3
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