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Logarithmic and Exponential Functions Test Review

Total questions: 17

Worksheet time: 34mins

Name
Class
Date
1.

Solve

 34=5ln(x2)34=5\ln\left(x-2\right)  

a)

6.

b)

898

c)

900

d)

902

2.

Solve

 2 ln(x1)+ln(4)=ln(103x)2\ \ln\left(x-1\right)+\ln\left(4\right)=\ln\left(10-3x\right)  

a)

2

b)

 34 , 2-\frac{3}{4}\ ,\ 2  

c)

 34-\frac{3}{4}  

d)

 ln(34), ln(2)\ln\left(\frac{3}{4}\right),\ \ln\left(2\right)  

3.

Solve

 e2x=37e^{2x}=37  

a)

1.805

b)

1.822

c)

1.931

d)

1.955

4.

Solve

 log4(x)log4(5)=log4(60)\log_4\left(x\right)-\log_4\left(5\right)=\log_4\left(60\right)  

a)

3

b)

12

c)

120

d)

300

5.

Choose the graph of

 f(x)=2xf\left(x\right)=2^x  

a)
b)
c)
d)
6.

Choose the graph of

 f(x)=3(x+1)f\left(x\right)=3^{\left(x+1\right)}  

a)
b)
c)
d)
7.

Find the balance in an account at the end of 14 years if $5000 is invested at an interest rate of 4.5% compounded continuously.

 A=PertA=Pe^{rt}  

a)

$9388.05

b)

$9259.72

c)

$8753.36

d)

$7841.56

8.

Evaluate

 log4134\log_4134  

a)

3.533

b)

3.623

c)

3.711

d)

3.782

9.

Choose the graph of

 f(x)=log2(x1)f\left(x\right)=\log_2\left(x-1\right)  

a)
b)
c)
d)
10.

In 2008, the wolf population in a certain area was 1200. The number of wolves increases exponentially at a rate of 3% per year. Predict the population in 2012.

 N=N0(1+r)tN=N_0\left(1+r\right)^t  

a)

1030

b)

1062

c)

1350

d)

1391

11.

Given

 f(x)=2xf\left(x\right)=2^x   and  g(x)=2(x2)g\left(x\right)=-2^{\left(x-2\right)}  , how does the graph of  gg   compare to the graph of  ff  ?

a)

shifted 2 units to the left and reflected in the x-axis

b)

shifted 2 units to the right and reflected in the y-axis

c)

shifted 2 units to the right and reflected in the x-axis

d)

shifted 2 units to the left and reflected in the y-axis

12.

Solve 5x=325^x=32  

a)

2.2023

b)

2.153

c)

2.241

d)

2.392

13.

Condense ln(11x)5ln(x)4ln(3y)\ln\left(11x\right)-5\ln\left(x\right)-4\ln\left(3y\right)  


a)

 ln(1181x4y4)\ln\left(\frac{11}{81x^4y^4}\right)  

b)

 ln(11x63y4)\ln\left(\frac{11x^6}{3y^4}\right)  

c)

 ln(81y411x4)\ln\left(\frac{81y^4}{11x^4}\right)  

d)

 ln(891x4y4)\ln\left(891x^4y^4\right)  

14.

Expand 2log3(6x24y3)2\log_3\left(\frac{6x^2}{4y^3}\right)  


a)

 2log362log344log3x6log3y2\log_36-2\log_34-4\log_3x-6\log_3y  

b)

 22log32+4log3x6log3y2-2\log_32+4\log_3x-6\log_3y  

c)

 2log36+4log3x6log34y2\log_36+4\log_3x-6\log_34y  

d)

 4log3(6x)6log3(4y)4\log_3\left(6x\right)-6\log_3\left(4y\right)  

15.

 log4(116)\log_4\left(\frac{1}{16}\right)  

Evaluate

a)

 12-\frac{1}{2}  

b)

 12\frac{1}{2}  

c)

 2-2  

d)

 22  

16.

What is the amount of time required for an investment to double at a rate of 8.2% if the interest is compounded continuously? A=PertA=Pe^{rt}  


a)

8.275 years

b)

8.453 years

c)

8.613 years

d)

8.772 years

17.

Write 43=644^3=64  in logarithmic form.

a)

 log34=64\log_34=64  

b)

 log464=3\log_464=3  

c)

 log364=4\log_364=4  

d)

 log643=4\log_{64}3=4