A rectangular box which is 7 in. by 7 in. by 3 in must be covered with brown packaging paper before it can be mailed. How
much paper is required?
a. 147 sq. in.
b. 182 sq. in.
c. 161 sq. in.
d. 91 sq. in.

Aparallel system functions whenever at least one of its components works. consider a parallel system of n components, and suppose each component works independently with probability 0.5. find the conditional probability that component n works given that the system is working

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Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?