Somebody pls help real fast :/

Which graph represents the parent function of y=(x+2)(x-2)

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean