Twin brothers, billy and bobby, can mow their grandparent's lawn together in 94 minutes. billy could mow the lawn by himself in 35 minutes less time that it would take bobby. how long would it take bobby to mow the lawn by himself?

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

What is x3+3x2−16x−48 divided by x−1?

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.