If Z is the standard normal random variable, find Pr(Z? 0.5).
A. 0.7723
B. 0.2277
C. 0.6915
D. 0.3085
E. none of these
Answer: C
Mathematics
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Find an equation for the line that passes through the given point and satisfies the given conditions.P = (-5, 5); parallel to v = -4i - 2j
A. -4x - 2y = 10 B. -4x - 2y = 20 C. y - 5 = - 7(x + 4) D. -2x + 4y = 30
Mathematics
Find the opposite of the number.9
A. -9
B. 
C. 9
D. - 
Mathematics
Find each product. Write the result in the form a + bi.(3 + 9i)(3 - 8i)
A. -72i2 + 3i + 9 B. -63 + 51i C. 81 - 3i D. 81 + 3i
Mathematics
Solve the problem.A rectangular enclosure must have an area of at least 4800 yd2. If 280 yd of fencing is to be used, and the width cannot exceed the length, within what limits must the width of the enclosure lie?
A. 60 ? w ? 70 B. 0 ? w ? 60 C. 60 ? w ? 80 D. 70 ? w ? 80
Mathematics