Joanna is carrying her books to school in her backpack. her library book weighs 3/8 of a kilogram. her science book weighs 5/8 kilograms. how much do joanna's book weigh altogether?

If benito is selecting samples of five values from the table, which row will result in the greatest mean? row 1 row 2 row 3 row 4

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

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.