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At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?

Cole says the distance between points (-5,0) and (0,-5)is 5 units. is he correct? explain why or why not.

The continuous random variable x is uniformly distributed over the interval [–1,3]. find -e(x) -var(x) -e(x²) -p(x < 1.4) a total of 40 observations of x are made.