Fatima will take an UBER to the movie theater. She will pay a one time fee of
$5 plus $2.65 per mile. Which equation
can be used to find y, the total cost of
the trip, if x represents the number of
miles of the trip?
A. y = 5x + 2.65
B. y = 5x - 2.65
C. y = 5 + 2.65x
Need
D. y = 5 - 2.65x

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.