Solve.The temperature on a December morning is -8°F at 3 a.m. If the temperature drops 5° by 4 a.m., rises 7° by 5 a.m., and then drops 4° by 6 a.m., find the temperature by 6 a.m.
A. 10°F
B. -10°F
C. -24°F
D. 24°F
Answer: B
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As part of a statistics project, a 6th grade teacher brings to class a container with 300 red marbles and 500 white marbles which are thoroughly mixed. To figure out how many marbles in the container are red without actually counting them all, a student randomly draws 40 marbles from the container. Of the 40 marbles drawn, 16 are red.The sample consists of
A. the 800 marbles in the container. B. the 40 marbles drawn by the student. C. the 16 red marbles drawn by the student. D. the 300 red marbles in the container. E. none of these
Graph the function and give its domain and its range.f(x) = 
A. (-?, ?); (-5, ?)
B. (-?, ?); (-?, ?)
C. (-?, ?); [5, ?)
D. (-?, ?); [-5, ?)
Solve the equation by expressing each side as a power of the same base and then equating exponents.3x = 27
A. {9} B. {4} C. {3} D. {2}
Clear fractions and solve.
+ 
- 
= 0
A. 1 B. 45 C. -3 D. 5