Solve the equation and express the solution in exact form.ln x - ln (x - 3) = ln 7
A. 
B. 
C. ?
D. {4}
Answer: B
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Find the expected value.A new light bulb has been found to have a 0.02 probability of being defective. A shop owner receives 500 bulbs of this kind. How many of these bulbs are expected to be defective?
A. 20 B. 100 C. 10 D. 500
Find the mean, median, mode, and midrange for the given data. Round to the nearest tenth if necessary.89, 86, 75, 72, 93, 89, 89, 86, 72, 93, 89, 75, 94, 72, 89, 89, 75, 86, 72, 89
A. mean = 83.7, median = 86, mode = 89, midrange = 83 B. mean = 83.7, median = 87.5, mode = 89, midrange = 83 C. mean = 83.7, median = 87.5, mode = 89, midrange = 22 D. mean = 84.2, median = 86, mode = 94, midrange = 22
Solve.Find 8 subtracted from 85.
A. 78 B. 87 C. 77 D. 76
Find the mean.1.6, 6.8, 8.5, 2.8, 4.7
A. 6.100 B. 24.40 C. 4.7 D. 4.88