When Kayla runs the 400 meter dash, her finishing times are normally distributed with a mean of 87 seconds and a standard deviation of 1 second. What percentage of races will her finishing time be between 86 and 88 seconds, to the nearest tenth?

The number of hours per week that the television is turned on is determined for each family in a sample. the mean of the data is 37 hours and the median is 33.2 hours. twenty-four of the families in the sample turned on the television for 22 hours or less for the week. the 13th percentile of the data is 22 hours. approximately how many families are in the sample? round your answer to the nearest integer.