Which of the following student-posed questions for statistical investigation is not quantifiable?
a. How many hours of sleep did the average student in our school get last night?
b. How many red cars go past our school in an hour?
c. What is the typical body temperature of a 13-year-old boy?
d. Why do some students in our school like vanilla ice cream rather than chocolate?
Ans: d
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Use the graph of the function f(x) to locate the local extrema and identify the intervals where the function is concave up and concave down.
A. Local minimum at x = 3 ; local maximum at x = -3 ; concave up on (0, ?); concave down on (-?, 0) B. Local minimum at x = 3 ; local maximum at x = -3 ; concave down on (0, ?); concave up on (-?, 0) C. Local minimum at x = 3 ; local maximum at x = -3 ; concave up on (-?, -3) and (3, ?); concave down on (-3, 3) D. Local minimum at x = 3 ; local maximum at x = -3 ; concave down on (-?, -3) and (3, ?); concave up on (-3, 3)
Solve the problem.Sara works at a fast food restaurant. On one day she sold 18 double hamburgers, 48 fish sandwiches, 52 orders of French fries, 97 small drinks, 59 medium drinks, and 55 large drinks. On the next day she sold 49 double hamburgers, 71 fish sandwiches, 66 orders of French fries, 67 small drinks, 86 medium drinks, and 98 large drinks. Write this information in a 2 x 6 matrix.
A. 
B. 
C. 
D. 
Simplify using order of operations.
A. -11 B. 8 C. 11 D. -8
Write the phrase as a mathematical expression. Use x to represent the number. Combine like terms if possible.6 times a number added to -8, added to 6 times the sum of 9 times the number 
A. 6x - 8 + 6(9 + 7x); 48x + 60 B. 6(-8 + x) + 6(9x + 7); 60x - 41 C. 6(9x + 7) + [6x + (-8)]; 60x + 34 D. 6(-8 + x) + 6(9 + 7x); 13x + 6