Find the variance of the probability density function to the nearest hundredth.f(x) = 
; [0, 5]
A. 0
B. 1.04
C. 2.09
D. 2.08
Answer: D
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(103 ð 10-5) ÄÄÄÄÄÄÄÄÄÄÄÄ = 106
a. 108 b. 106 c. 104 d. 10-2 e. 10-8
Solve the problem.A guy wire to a tower makes a 67° angle with level ground. At a point 33 ft farther from the tower than the wire but on the same side of the base as the wire, the angle of elevation to the top of the pole is 38°. Find the wire length (to the nearest foot).
A. 47 ft B. 89 ft C. 84 ft D. 42 ft
Determine whether the equation defines y as a function of x.x = y2
A. y is a function of x B. y is not a function of x
Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. An insurance company is willing to insure the concert for $150,000 against rain for a premium of $30,000. If he buys this policy, what are his expected earnings from the concert?
A. $180,000 B. $300,000 C. $270,000 D. $239,400