Select TWO scenarios that can be
represented by the expression 4x - 4.
A. Jack earns $4 per hour but owes his
parents $4; x represents the number
of hours he works.
B. Alex is 4 years older than 4 times
Ava's age; x represents Ava's age.
C. A store has a 4% discount on gloves;
Mike bought x pairs of gloves at
$4 a pair.
D. Jane bought x number of tickets at
$4 each and had a coupon for $4
off the total cost.

Abottled water distributor wants to estimate the amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company. the water bottling company’s specifications state that the standard deviation of the amount of water is equal to 0.02 gallon. a random sample of 50 bottles is selected, and the sample mean amount of water per 1-gallon bottle is 0.995 gallon a. construct a 99% confidence interval estimate for the popula-tion mean amount of water included in a 1-gallon bottle. b. on the basis of these results, do you think that the distributor has a right to complain to the water bottling company? why? c. must you assume that the population amount of water per bottle is normally distributed here? explain. d. construct a 95% confidence interval estimate. how does this change your answer to (b)?