Find the weighted mean of the numbers in the table. Round to the nearest tenth.A class of 44 students took a 10-point quiz. The frequency of scores is given in the table. 
A. 7.8 points
B. 7.3 points
C. 7.6 points
D. 7.5 points
Answer: A
Mathematics
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Use the product rule to simplify the expression. Assume that the variables can be any real number.
A. 5
B. 20
C. 5
D. 5
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Prepare a probability distribution for the experiment. Let x represent the random variable, and let P represent the probability.Three balls are drawn from a bag containing 5 red and 3 green balls. The number of green balls is counted.
A. 
B. 
C. 
D. 
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Find the points of inflection.f(x) = x3 - 3x2 + 2x + 15
A. (1, 15) B. (-1, -3) C. (1, -1) D. (1, -3)
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Use geometry to evaluate the definite integral.
A. 15 B. 30 C. 10 D. 12
Mathematics