Jackie used to be on the phone 2 1 3 times as much as her brother. her parents threatened to take away the phone, so she cut down to 5 2 of the time she used to be on the phone. how many times as much as her brother is jackie now on the phone?

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?