SD( X )
The probability density function of X is f (x) = 4/x5 over [1, x= ?). Compute the quantity.
2 / 9
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Determine whether 9 is a factor of the number.892
A. Yes B. No
Solve the problem.A room in the shape of a triangle has sides of length 18.5 yards, 
and 
If carpeting costs $21.83 per square yard, padding costs 
per square yard, and there is no charge for installation, how much, to the nearest dollar, will it cost to carpet the room?
A. $615 B. $132 C. $3198 D. $5684
Use Bayes' rule to find the indicated probability.An water well is to be drilled in the desert where the soil is either rock, clay or sand. The probability of rock P(R) = 0.53. The clay probability is P(C) = 0.21. The sand probability is P(S) = 0.26. It if it rock, a geological test gives a positive result with 35% accuracy. If it is clay, this test gives a positive result with 48% accuracy. The test gives a 75% accuracy for sand. Given the test is positive, what is the probability that soil is clay, P(clay | positive)?
A. P(clay | positive) = 0.53 B. P(clay | positive) = 0.209 C. P(clay | positive) = 0.405 D. P(clay | positive) = 0.385
Evaluate.
A. 4,098,600 B. 91,080 C. 3,575,880 D. 164,490,480