Algebra II Pretest

Chapter: 15
Standard: F.TF.5
DOK: 3
1 pt

5.

A scuba diver and his crew on deck spot some dolphins jumping in and out of the water as they swim through the ocean. Let the function $$D(x)={x}^{4}-38{x}^{3}+519{x}^{2}-3002x+6160$$
represent the path that the dolphins travel, where *x* represents the time since the start of travel and *y* represents the dolphins' distance above and below the surface of water. The scuba diver and his crew monitored the dolphins for a 20 second interval. At what times (in seconds) during this 20 second interval were the dolphins at the surface level? *(Hint: Look for when x equals zero.)*

A

0 and 10 seconds

B

4 and 9 seconds

C

3, 7, and 11 seconds

D

5, 8, 11, and 14 seconds

Chapter: 17
Standard: S.IC.3
DOK: 3
1 pt

9.

Students at a college want to have a vote to see which theme should be selected for this year’s homecoming dance. Look at the sampling strategies chosen by four different college representatives below. Choose the answer that would provide the best sampling method for making the decision for the homecoming dance theme.

A

Representative 1 went to a campus sporting event and asked all the people in the home stands.

B

Representative 2 pulled out the alumni phone directory and called every 12th person in the directory.

C

Representative 3 spent all week on the campus green asking students on their way to class for their vote.

D

Representative 4 went to the fast food restaurant around the corner from the campus and asked visitors as they entered the restaurant to select a theme.

Chapter: 1
Standard: N.CN.2
DOK: 2
1 pt

10.

What is the simplified form of $$\frac{2+4i}{3-i}$$ ?

A

$$\frac{1+5i}{7}$$

B

$$\frac{7i}{5}$$

C

$$\frac{1+7i}{5}$$

D

$$\frac{5i}{7}$$

Chapter: 3
Standard: A.SSE.2
DOK: 1
1 pt

14.

If $$ax-ay-bx+by$$ is factored completely, it would be:

A

$$(xy)(-ab)$$

B

$$(x-y)(a-b)$$

C

$$a(xy)b$$

D

$$y(ab-x)$$

Chapter: 9
Standard: F.IF.5
DOK: 1
1 pt

26.

State the domain of the following function using interval notation.

A

$$(-\infty ,2]$$

B

$$(-\infty ,\infty )$$

C

$$[-2,\infty )$$

D

$$[-\infty ,\infty ]$$