# Math Practice Test

____ 1. For the following function, first find all values of x such that then find all x such that

____ 2. If one zero of the following function is 4, find the other two zeros.

____ 3. Use the remainder theorem to find

____ 4. Use the factor theorem to decide whether x-c is a factor of the polynomial.

a. x - c is a factor

b .x - c is not a factor

____ 5. Use synthetic division to decide whether c is a zero of .

a. x - c is a zero

b. x - c is not a zero

____ 6. Find a polynomial with leading coefficient of 1, degree 3, and zeros: -5,0,9.

____ 7. Use synthetic division to find the quotient and remainder if the first polynomial is divided by the second.

____ 8. Find a polynomial of degree that has the indicated zeros and satisfies the given condition.

____ 9. Find the fourth-degree polynomial function whose graph is shown in the figure.

____ 10. A polynomial f ( x ) with real coefficients and leading coefficient 1 has the given zeros and degree. Express f ( x ) as a product of linear and quadratic polynomials with real coefficients that are irreducible over R.

____ 11. Find the oblique asymptote of

____ 12. Determine whether the function f is one-to-one

a. one-to-one

b. not one-to-one

____ 13. Use the theorem on inverse functions to determine whether f and g are inverse functions of each other.

a. f and g are inverse functions of each other.

b. f and g are not inverse functions of each other.

____ 14. Determine the range of
for the function without actually finding
.

Hint: First find the domain and range of f

____ 15. Find the inverse function of f

____ 16. Solve the equation :

____ 17. Sketch the graph of f if:

____ 18. Find an exponential function of the form f (x) = ba^{x} that has the
given y-intercept and passes through the point P:

____ 19. The number of bacteria in a certain culture increased from 600 to 1,800 between 7:00 A.M. and 9:00 A.M. Assuming the growth is exponential, the number f (t) of bacteria t hours after 7:00 A.M. is given by:

Estimate the number of bacteria in the culture at 10:00 A.M.

____ 20. The radioactive bismuth isotope ^{210}Bi
has a half-life of 5 days. If there is 100 milligrams of ^{210}Bi
present at t = 0, then the amount f(t) remaining after t days is given by:

How much ^{210}Bi remains after 25 days?

a.8.125 milligrams

b.12.125 milligrams

c.2.125 milligrams

d.3.125 milligrams

e.5.125 milligrams

____ 21. In 1980, the population of blue whales in the southern hemisphere was thought to number 5,000. The population N(t) has been decreasing according to the formula

where t is in years and t = 0 corresponds to 1980. Predict the population in the year 2010 if this trend continues.

____ 22. Use the graph of y = e^{x} to help sketch
the graph of

____ 23. If $900 is deposited in a savings account that pays interest at a rate of per year compounded continuously , find the balance after 7 years.

a.$1,369.77

b.$581.08

c.$1,393.95

d.$1,418.56

e.$3,484.87

____ 24. An investment of $835 increased to $16,771 in 20 years. If the interest was compounded continuously, find the interest rate.

a.14%

b.30%

c.17%

d.15%

e.12%

____ 25. The 1980 population of the United States was approximately 227 million, and the population has been growing continuously at a rate of 0.7% per year. Predict the population in the year 2040 if this growth trend continues.

a.322 million people

b.229 million people

c.345 million people

d.382 million people

e.379 million people

____ 26. Change to exponential form.

____ 27. Solve the equation.

____ 28. Solve the equation.

____ 29. Express in terms of logarithms of x , y, z, or w.

____ 30. Write the expression as one logarithm.

____ 31. Solve the equation.

____ 32. Find the exact solution, using common logarithms, and an approximation of the solution of the equation to two decimal places .

____ 33. Use the compound interest formula to determine how long it will take for a sum of money to double if it is invested at a rate of 6% per year compounded monthly.

a.11.58 years

b.16.67 years

c.11.90 years

d.14.75 years

e.10.41 years

** Multiple Response **

Identify one or more choices that best complete the statement or answer the
question.

____ 34. Find the zeros of , and state the multiplicity of each zero.

____ 35. Use Descartes' rule of signs to determine the number of possible positive, negative, and nonreal complex solutions of the equation.

a.0 positive roots , 3 negative roots, 0 nonreal roots

b.2 positive roots, 1 negative root , 0 nonreal roots

c.1 positive root, 0 negative roots, 2 nonreal roots

d.1 positive root, 2 negative roots, 0 nonreal roots

e.3 positive roots, 0 negative roots, 0 nonreal roots

f.0 positive roots, 0 negative roots, 3 nonreal roots

**practicetest2_ch3_4
Answer Section**

**MULTIPLE CHOICE**

1. ANS:E

2. ANS:E

3. ANS:B

4. ANS:A

5. ANS: A

6. ANS:A

7. ANS:B

8. ANS:A

9. ANS: E

10. ANS: B

11. ANS: D

12. ANS:A

13. ANS:A

14. ANS: E

15. ANS: C

16. ANS: E

17. ANS: B

18. ANS: C

19. ANS: D

20. ANS: D

21. ANS: B

22. ANS: C

23. ANS: C

24. ANS: D

25. ANS: C

26. ANS: C

27. ANS: E

28. ANS: B

29. ANS: A

30. ANS: C

31. ANS: B

32. ANS: A

33. ANS: A

**MULTIPLE RESPONSE**

34. ANS: B, D, F

35. ANS: C, E

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