2 people can make 2 bicycles in 2 hours. How many people are needed to make 12 bicycles in 6 hours.

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.

Find two numbers if their ratio is 4: 7 and their difference is 123.

Find the absolute maximum and absolute minimum values of the function f(x)= x^3+12x^2−27x+12 over each of the indicated intervals. (a) interval = [−10,0] absolute max and min (b) interval = [−7,2] absolute max and min (c) interval = [−10,2] absolute max and min