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Cumulative Exam — Cumulative exam Answers

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Which of the following is the graph of ?

Question illustration
A
On a coordinate plane, an absolute value curve curves up and to the right in quadrant 4 and starts at y = negative 1.
Option A
B
On a coordinate plane, an absolute value curve curves up and to the right in quadrant 4 and starts at y = 1.
Option B
C
On a coordinate plane, an absolute value curve opens down and to the left in quadrant 2 and starts at y = 1.
Option C
D
On a coordinate plane, an absolute value curve opens down and to the left in quadrant 2 and starts at y = negative 1.
Option D
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Which graph represents ?

Question illustration
A
On a coordinate plane, a cubic function has an inflection point at (0, negative 2).
Option A
B
On a coordinate plane, a cubic function has an inflection point at (negative 2, 0)
Option B
C
On a coordinate plane, a cubic function has an inflection point at (0, 2).
Option C
D
On a coordinate plane, a cubic function has an inflection point at (2, 0).
Option D
23

What is the solution to the equation ?

Question illustration
m
m = –4
m
m = –2
m
m = 2
m
m = 4
24

A biologist begins working with a sample containing 20,000 bacteria. The population size doubles every 10 days according to the equation , where t represents the number of days. After seven days the biologist begins working with a second sample of 20,000 bacteria. The equation used to represent the population of sample 2 after t days is . Which of the following is an equivalent form of the equation for the population of sample 2?

Question illustration
A
mc006-3.jpg
Option A
B
mc006-4.jpg
Option B
C
mc006-5.jpg
Option C
D
mc006-6.jpg
Option D
25

Tyna simplified the expression to . What was Tyna’s mistake?

Question illustration
S
She divided the coefficients incorrectly.
S
She added the exponents instead of subtracting them.
S
She divided the coefficients instead of subtracting them.
S
She subtracted the exponents instead of dividing them.

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