Petra jogs 5 miles in 40 minutes. at this rate, how long would it take her to jog 7 miles? petra would take minutes to jog 7 miles. petra jogs 5 miles in 40 minutes. at this rate, how long would it take her to jog 7 miles? petra would take minutes to jog 7 miles.

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.