Afootball team stood in a circle before a game to plan their strategy. the circle they formed had a radius of 1 yard. what is the circle's diameter?

yards

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

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.