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Honors Pre-Calculus QBA #2

Total questions: 25

Worksheet time: 2hrs 5mins

Name
Class
Date
1.

Evaluate (2)−2\left(2\right)^{-2}

a)

-4

b)

4

c)


−14-\frac{1}{4}

d)


14\frac{1}{4}

2.

Evaluate 12112121^{\frac{1}{2}}

a)

11

b)

60.5

c)


111\frac{1}{11}

d)

14,641

3.

Evaluate 2⋅8\sqrt[]{2}\cdot\sqrt[]{8}

a)


10\sqrt[]{10}

b)

3.99

c)

4

d)


6\sqrt[]{6}

4.

Simplify (3x2y5)3\left(3x^2y^5\right)^3

a)


9x5y89x^5y^8

b)


27x6y1527x^6y^{15}

c)


1x23y531x^{\frac{2}{3}}y^{\frac{5}{3}}

d)


3x6y153x^6y^{15}

5.

Simplify 8n102n5\frac{8n^{10}}{2n^5}

a)


4n54n^5

b)


6n26n^2

c)

4n

d)


4n5\frac{4}{n^5}

6.

Express a6b3\sqrt[]{a^6b^3} using rational exponents. Assume all values of the variables are positive.

a)


a6b3a^6b^3

b)


a3b32a^3b^{\frac{3}{2}}

c)


a2ba^2b

d)


a12b6a^{12}b^6

7.

Express r14s12t23r^{\frac{1}{4}}s^{\frac{1}{2}}t^{\frac{2}{3}} using a single radical. Assume all values of the variables are positive.

a)


rs2t24\sqrt[4]{rs^2t^2}

b)


r4s3t23\sqrt[3]{r^4s^3t^2}

c)


r3s6t812\sqrt[12]{r^3s^6t^8}

d)


r2st3\sqrt[]{r^2st^3}

8.

Describe the transformation on the parent graph for y=3x+4y=3^x+4 .

a)

translation left 4

b)

translation right 4

c)

translation down 4

d)

translation up 4

9.

Describe the transformation on the parent graph for y=3(x−4)y=3^{\left(x-4\right)} .

a)

translation left 4

b)

translation right 4

c)

translation down 4

d)

translation up 4

10.

Describe the transformation on the parent graph for y=−3xy=-3^x .

a)

translation left 3

b)

translation down 3

c)

reflection over the x-axis

d)

reflection over the y-axis

11.

After 5 years, an account is worth $3500.00. Find the amount of money that was invested if the interest rate is 3.5% compounded continuously. Use A=Pe(rt)A=Pe^{\left(rt\right)}

a)

$2,938.10

b)

$608.21

c)

$2,946.91

d)

$19.80

12.

Sarah invests $5400 in an account that compounds interest weekly at a rate of 4.1%. How much will she have in her account after 10 years? Use A=P(1+rn)(nt)A=P\left(1+\frac{r}{n}\right)^{\left(nt\right)}

a)

$8,136.82

b)

$8,135.50

c)

$11,534.24

d)

$320,640.31

13.

The population of a certain city is decreasing by 1.5% per year. If there were 510,000 people in 2020, what will the population be by 2050? Use N=N0e(kt)N=N_0e^{\left(kt\right)}

a)

799,839

b)

5,666

c)

325,190

d)

340,159

14.

Write log⁡b3=x\log_b3=x in exponential form.

a)


bx=3b^x=3

b)


3x=b3^x=b

c)


xb=3x^b=3

d)


x3=bx^3=b

15.

Write 2−3=182^{-3}=\frac{1}{8} in logarithmic form.

a)


log⁡−3 18=2\log_{-3}\ \frac{1}{8}=2

b)


log⁡−3 2=18\log_{-3}\ 2=\frac{1}{8}

c)


log⁡2 18=−3\log_2\ \frac{1}{8}=-3

d)


log⁡2 (−3)=18\log_2\ \left(-3\right)=\frac{1}{8}

16.

Evaluate log⁡216=x\log_216=x .

a)

x = 4

b)

x = 8

c)


x=18x=\frac{1}{8}

d)

x = -4

17.

Evaluate log⁡5 125=x\log_5\ \frac{1}{25}=x .

a)

x = 2

b)

x = 5

c)


x=15x=\frac{1}{5}

d)

x = -2

18.

Evaluate log⁡557\log_55^7 .

a)

1

b)

3

c)

5

d)

7

19.

Find the value of log⁡627.5\log_627.5 using the change of base formula.

a)

0.661

b)

1.439

c)

1.850

d)

2.232

20.

Simplify 2log⁡3x+log⁡3y2\log_3x+\log_3y into a single logarithm and simplify if possible.

a)

log⁡3(y2)\log_3\left(\frac{y}{2}\right)

b)

log⁡3(yx2)\log_3\left(\frac{y}{x^2}\right)

c)

log⁡3(x2y)\log_3\left(x^2y\right)

d)

log⁡3(xy2)\log_3\left(xy^2\right)

21.

Expand log⁡5(a3bc2)\log_5\left(\frac{a^3b}{c^2}\right) using the properties of logarithms.

a)

3log⁡5a+log⁡5b−2log⁡5c3\log_5a+\log_5b-2\log_5c

b)

3log⁡5a−(log⁡5b+2log⁡5c)3\log_5a-\left(\log_5b+2\log_5c\right)

c)

3log⁡5a−(log⁡5b−2log⁡5c)3\log_5a-\left(\log_5b-2\log_5c\right)

d)

log⁡5(3a)+log⁡5b−log⁡5(2c)\log_5\left(3a\right)+\log_5b-\log_5\left(2c\right)

22.

Solve for x: log⁡4x+log⁡4(x−2)=log⁡415\log_4x+\log_4\left(x-2\right)=\log_415

a)

x = -3

b)

x = 5

c)

x = -3 and 5

d)

x = -5 and 3

23.

Solve for x: log⁡23−log⁡2(x+1)=3\log_23-\log_2\left(x+1\right)=3

a)


x=112x=\frac{1}{12}

b)


x=12x=\frac{1}{2}

c)

No solution

d)


x=−58x=-\frac{5}{8}

24.

Solve for x: log⁡x36=2\log_x36=2

a)

x = 6

b)

x = 1296

c)

x = 5.17

d)

x = 1

25.

Solve for x: 5x=2005^x=200

a)

x = 2.457

b)

x = 3.292

c)

x = 0.304

d)

x = 40