Quiz about 6/10 Review

Question 1

Describe the roots of this graph.

Accepted Answer

1 real root

Answer

2 imaginary roots

Answer

2 real, rational roots

Answer

2 real, irrational roots

Question 2

$$y=\frac{1}{16}\left(x-2\right)^2+7$$

What is the vertex of this parabola?

Accepted Answer

(2,7)

Answer

(-2,7)

Answer

(2,-7)

Answer

(-2,-7)

Question 3

$$y=\frac{1}{16}\left(x-2\right)^2+7$$

How far is the directrix from the vertex in this parabola?

Accepted Answer

4 units below

Answer

16 units below

Answer

16 units above

Answer

4 units above

Question 4

The results of a survey asking employees at an office how much money they make is normally distributed. If there are 100 workers at this office, how many of them can we expect to be within two standard deviations of the average salary?

Accepted Answer

95

Answer

68

Answer

99

Answer

83

Question 5

Which expression is equivalent to $$\sqrt[3]{x^4y^6}$$ ?

Accepted Answer

$$x^{\frac{4}{3}}y^2$$

Answer

$$x^{\frac{3}{4}}y^2$$

Answer

$$x^{\frac{4}{3}}y^3$$

Answer

$$x^{\frac{3}{4}}y^3$$

Question 6

$$A=P\left(1+\frac{r}{n}\right)^{nt}$$
If a credit card company is charging 4% interest monthly on a $50 bill, which would calculate the total amount owed after 2 years of being unpaid?

Accepted Answer

$$A=50\left(1+\frac{.04}{12}\right)^{12\cdot2}$$

Answer

$$A=P\left(\frac{1.04}{12}\right)^{12\cdot2}$$

Answer

$$A=P\left(\frac{0.04}{12}\right)^{12\cdot2}$$

Answer

$$A=P\left(1+\frac{.04}{2}\right)^{12\cdot2}$$

Question 7

In which quadrants is cosine positive?

Accepted Answer

I and IV

Answer

I and II

Answer

I and III

Answer

II and IV

Question 8

What would the 5th number of this sequence be?
$$a_1=2$$ and $$a_n=2a_{n-1}-1$$

Accepted Answer

17

Answer

32

Answer

33

Answer

9

Question 9

What's the probability that someone likes skateboards given that they do not like snowmobiles?

Accepted Answer

$$\frac{45}{55}$$

Answer

$$\frac{45}{125}$$

Answer

$$\frac{55}{160}$$

Answer

$$\frac{25}{35}$$

Question 10

Which statement is true?

Accepted Answer

As $$x\rightarrow-\infty,\ y\rightarrow-\infty$$

Accepted Answer

As $$x\rightarrow\infty,\ y\rightarrow\infty$$

Answer

As $$x\rightarrow-\infty,\ y\rightarrow\infty$$

Answer

As $$x\rightarrow\infty,\ y\rightarrow-\infty$$

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