Solve.The temperature on a March morning is -9°F at 6 a.m. If the temperature drops 2° by 7 a.m., rises 6° by 8 a.m., and then drops 2° by 9 a.m., find the temperature by 9 a.m.
A. 7°F
B. 19°F
C. -7°F
D. -19°F
Answer: C
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Write a proportion that models the situation described. Then, solve the proportion for x.11 is to 12, as 3 is to x
A. 
= 
; x = 
B. 
= 
; x = 
C. 
= 
; x = 
D. 
= 
; x = 
Solve the problem.The mathematical model 
represents the cost in dollars a company has in producing x items during a month. Based on this, how much does it cost to produce 
? Interpret the question and answer using function notation.
A. $350,000; f(350,000) = 700 B. $350,000; f(700) = 350,000 C. $390,000; f(700) = 390,000 D. $390,000; f(390,000) = 700
Provide an appropriate response.English classes at Jonesburg High School have enrollments of 26, 23, 33, 39, 40, 36, 26, 34, 27, and 36 students. Which measure of central tendency gives the best average class size?
A. Median B. Mode C. Weighted mean D. Mean
Write the expression in exponential form. Assume that all variables represent positive real numbers. 
A. x-1/3 B. x-3 C. x1/3 D. x3