Jim is clearing out trees and planting grass to enlarge his backyard. he plans to double both the width and the length of his current rectangular backyard, as shown.

a. how will the area of jim's new backyard compare to the area of his current backyard? b. will it take jim twice as long to mow his new backyard then his old backyard? explain. (assume jim mows at the same rate for both yards.)

The ratio of men to women working for a company is 4 to 5 . if there are 90 women working for the company, what is the total number of employees?

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Cor d? ? me ? max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.