Julio is at a car race. starting from 0.5 mi away, the car drives toward him and then passes him. the car travels at a constant rate of 110 mi per hour. the distance of the car from julio is given by 2=|0.5 - 110t|. at what times is the car 0.05 miles from julio? calculate your answer in seconds.

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.