Emily lived in a blue house for 4.5 years. then she lived in a yellow house for 3.6 years. how many years did emily live in the two houses? hayley had 3.93 grams of salt. she added more salt to the sample and now has 4.87 grams. how many grams of salt did hayley add?

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

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.

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line