Me maria's family drove 140 mi to her grandparents' house and averaged 56 mi/h on the way there. on the return trip, they averaged 50 mi/h . what was the total time maria's family spent driving to and from her grandparents' house? 2.5 h 2.6 h 5.2 h 5.3 h

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

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.