Precalculus Practice Exam

Part 3 Test 1 Time: 1 hour

  1. Let tex2html_wrap_inline80 .

  2. Solve for x algebraically:

  3. Compress the expression


    into one simplified logarithm.

    Answer: tex2html_wrap_inline116

    Give the domain of the original expression.

    Answer: x>3

  4. The radioactive element carbon-14 has a half-life of about 5,750 years. The percentage of carbon-14 present in the remains of animal bones can be used to determine age. How old is an animal bone that has lost 40% of its carbon-14?

    Answer: 4257 years

  5. Solve the system algebraically:


    Answer: x=1, y=-1, z=2

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Tue Jun 17 21:33:49 MDT 1997

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