Find the probability of obtaining exactly two threes on four rolls of a fair die.
?
A. 0.559
B. 0.243
C. 0.068
D. 0.116
E. 0.131
Answer: D
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There are six blue balls, four yellow balls, and nine red balls contained in a hat. Which of the following is a true statement? ?
A. ?The ratio of yellow balls to red balls is larger than the ratio of yellow balls to blue balls. B. ?The ratio of yellow balls to red balls is smaller than the ratio of blue balls to red balls. C. ?The ratio of all the balls to blue balls is 19 : 4. D. ?The ratio of blue and yellow balls to red balls is less than the ratio of red balls to the total number of balls. E. ?The ratio of "non-yellow" balls to the total number of balls is equivalent to 1 - (ratio of red and blue balls to total number of balls).
Factor the expression completely, if possible.49x2 - 36y2
A. (7x - 6y)2 B. (7x + 6)(7x - 6) C. (7x + 6y)(7x - 6y) D. (7x + 6y)2
Find the range of the set of numbers.8, 9, 8, 15, 13
A. 5 B. 11 C. 7 D. 15
Use a calculator to graph the function. y = -cos2x
A. 
B. 
C. 
D. 