Suppose that the time (in hours) required to repair a machine is an exponentially distributed random variable with parameter λ=0.1λ=0.1. What is (a) the probability that a repair time exceeds 99 hours? (b) the conditional probability that a repair takes at least 1212 hours, given that it takes more than 77 hours?

Nikolas calculated the volume of the prism. his work is shown below.

Select the correct answer from each drop-down menu. the length of a rectangle is 5 inches more than its width. the area of the rectangle is 50 square inches. the quadratic equation that represents this situation is the length of the rectangle is inches.

Unaware that 35% of the 10000 voters in his constituency support him, a politician decides to estimate his political strength. a sample of 200 voters shows that 40% support him. a. what is the population? b. what is the parameter of interest? state its value c. what is the statistics of the interest? state its value d. compare your answers in (b) and (c) is it surprising they are different? if the politician were to sample another 200 voters, which of the two numbers would most likely change? explain