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Math 89 Final Exam Review
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A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys. She selects the five closest to her desk. What type of data sampling is this?
Convenience sampling
Population or Sample? All of the teachers in a school are surveyed on their meeting time preferences.
Population
Population or Sample? The average weight of every person entering the mall within 3 hour period was 146 lb.
Population
Population or Sample? A survey of 1353 American households found that 18% of the households own a computer.
Sample
Which animal was the most common pet?
Cat
There are 3 red marbles, 4 blue marbles, 2 green marbles, and 6 clear marbles in a burlap bag. One marble is randomly pulled from the bag. What is the probability the marble was green as a fraction in lowest terms??
2/15
One card is randomly picked from a regular deck of cards. What is the theoretical probability that the card picked is a jack as a fraction in lowest terms?
1/13
A spinner has 8 equal regions. Each region is marked with one of the following numbers: 10, 20, 30, 40, 50, 60, 70, 80. What is the probability of an even number being spun on the first roll?
1 or 100%
A coin is to be tossed twice. p(Tails, Tails) = ___ as a fraction in lowest terms
1/4
Find the mode: 13, 16, 18, 19, 21, 24, 14, 20, 32
No mode
Find the median: 21, 32, 45, 60, 13, 25
28.5
Find the mean of 16,12,20,15,12
15
Find the median: 79, 86, 86, 97 100, 95, 67
86
Find the mean of 2.2, 1.2, 3.4, 2
2.2
Find the mode: 44,29,13,44,15
44
A regular 6-sided die is to be rolled once. What is the probability that a number less than 3 is rolled as a fraction in lowest terms?
1/3
A regular 6-sided die is to be rolled once. What is the probability that a number less than or equal to 4 is rolled as a fraction in lowest terms?
2/3
A regular 6-sided die is to be rolled one time. What is the probability that the number 5 is rolled as a fraction in lowest terms??
1/6
Why is this graph misleading?
Exaggerated area/volume
Why is this graph misleading?
Displaced axis (does not start at 0)
Why is this graph misleading?
Displaced axis (does not start at 0)
Why is this graph misleading?
Irregular Scale (the x-axis does not have equal intervals)
What is the volume? A:90 cmÂł B:150 cmÂł C:180 cmÂł
A
Find the volume of the cylinder.A: 4239 B: 1696 C:1130 D:565
B
What is the volume? A:1120 ft2 B:2011 ft2 C:120 ft3 D:1120 ft3
D
What is the surface area? A:81 m2 B:297 m2 C:108 m2 D:216 m2
297 m2
What is the angle of rotation for the following figure?
90 degrees
How many degrees is the rotation (from red to blue)?
180 degrees
What is the surface area?A: 96 ft2 B:192 ft2 C:84 ft2 D:108 ft2
A
What is the surface area?
220 cm2
What is the surface area?
216 yd2
Rotate shape A (purple) 90 degrees about (0,0) to get...
B
Rotate shape O (green) -270 degrees about (0,0) to get.
Z
Rotate shape B (blue) -270 degrees about (0,0) to get.
O
Rotate shape O (green) 90 degrees about (0,0) to get...
Z
The two rectangles are scale drawings. What is the measurement of x?
20
What is the scale factor?
2
Rewrite as a fraction: 0.123
123/1000
50% is what fraction in lowest terms?
1/2
Convert to a decimal 1/10
0.1
Change this decimal to a percent: 0.52
52%
Convert to a decimal 3/4
0.75
What is 5% as a decimal?
0.05
Scale Factor of ½ is an enlargement or reduction?
Reduction
Graph. y = -4
C
A: y= -1x+3 B: y= 4x+3 C: y=(1/4)x+3 D: y= -4x+3
B.
What is the y intercept? y = 2x - 3
-3
What is the y-intercept of the line?
-1
A. -3x +2y = -6 B: 3x + 2y = 6 3x + 2y = 6 C: -3x - 2y = 12 D: -3x + 2y = -12
D
What is the x-intercept of x+4y=7?
(7, 0)
What is the x-intercept of x+4y=7?
(7, 0)
What is the y-intercept of 2x-5y=35?
(0, -7)
Which is the better deal? Oreos $2.98 for 15 oz OR Chips Ahoy $2.50 for 14 oz
Chips Ahoy
Alycia earned $20.40 in 3 hours. What is her unit rate in dollars per hour?
$6.80 per hour
An eighth-grade math teacher can grade 25 homework assignments in 20 minutes. Is he working at a faster rate or slower rate than grading 36 homework assignments in 30 minutes?
Faster
If Justin can type 408 words in 4 minutes, how many words can he type per minute?
102 words per minute
You spend $40 on 5 pounds of concrete. What is the unit rate in dollars per pound?
$8 per pound
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