OK OK PLEASE I REALLY NEED HELP :'( IM FAILING IN MATH BUT DIS WILL HELP SOO MUCH ALL BELOW

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction

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.

Select the term that describes the linear portion in this quadratic equation 7x^2-12x+16=0 a) -12x b) 7x^2 c) 16