Which table shows exponential decay?
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Which expression and diagram represent “renee biked four times as far this month as last month”?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

The coverage of a base station of a telecommunication company forms a disk with a radius of (kilometers). let be the distance of a cellphone from a base station. assume that the location of cellphones in use are randomly uniformly distributed within the disk. calculate the mean and variance for the random variable.