The dimensions of the jib sail of a sailboat are shown. Which equation could be used to find the height of the boat's main sail, if it's base is 1.6 meters and the area is twice as much as the area of the jib sail?

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.