2. the caffeine content of a random sample of 21 cups of black coffee dispensed by a new machine is measured. the
mean and standard deviation for the sample are 110 mg and 5.0 mg, respectively. construct a 98% confidence
interval for the population mean amount of caffeine..
*e=tcls.
e= 2.528 1 8 1 ) = 2
cmc112.76

Harold wrote this equation to model the level of water in a pool over time. the variable x represents time in hours. f(x) = 3,500 - 225x which statements about the situation are true? check all that apply. the water level is rising. the water level is falling. the initial level of water in the pool was 3,500 units. the initial level of water in the pool was 225 units. the pool was empty after 14 hours. the water was 2,600 units high after 4 hours.