Evaluate the improper integral.
A. 15
B. 5
C. 0
D. 3
Answer: A
Mathematics
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Factor by grouping.14r2 + 63ry - 2xr - 9xy
A. (2r + 9y)(7x - r) B. (2r + 9y)(7r - x) C. (2r + 9y)(x - 7r) D. (9r + 2y)(7r - x)
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Provide an appropriate response.The random variable X has density function f(x) = 
Find P(X ? 4). Give answer in terms of e.
What will be an ideal response?
Mathematics
Provide an appropriate response.In a raffle 1000 tickets are being sold at $1.00 each. The first prize is $100, and there are 3 second prizes fo $50 each. By how much does the price of a ticket exceed its expected value?
A. $1.00 B. $0.75 C. $1.75 D. $50
Mathematics
Use the square root property to solve the equation.3x2 = 21
A. 8
B. ±7
C. ±
D. 10.5
Mathematics