Micaela and Chelsea each improved their yards by planting rose bushes and ivy. They bought their supplies from the same store. Micaela spent $58 on 5 rose bushes and 3 pots of ivy . Chelsea spent $100 on 5 rose bushes (x) and 10 pots of ivy (y). Write equations to represent the scenario. Then, graph to find the cost of one rose bush () and the cost of one pot of ivy ().

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)?