Solve for x. x4≥−8 a. x≤−32 b. x≤−2 c. x≥−2 d. x≥−32

Match the one-to-one functions with their inverse functions.

Find the rate of change for the situation. you run 7 miles in one hour and 21 miles in three 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.