Solve the application problem.Find the lengths of the legs of the right triangle.
A. 6, 9
B. 9, 18
C. 18, 24
D. 9, 12
Answer: D
Mathematics
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Refer to the following normal curve, with mean ? and standard deviation ?.
The standard deviation ? =
A. 12 B. 24 C. 3 D. 6 E. none of these
Mathematics
Prepare a probability distribution for the experiment. Let x represent the random variable, and let P represent the probability.Two marbles are drawn from a bag in which there are 4 red marble and 2 blue marble. The number of blue marbles is counted.
A. 
B. 
C. 
D. 
Mathematics
Find the sum.137.9 + 0.83 + 85.88 + 25 + 2.2
A. 252.81 B. 251.91 C. 251.82 D. 251.81
Mathematics
Use the power rule to simplify.(-78)7
A. (-49)8 B. (-7)56 C. (-49)56 D. (-7)15
Mathematics