Percent change in 66 to 30 toy fed to nearest percent.

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population,find the population standard deviation, o.79828588912497

Which graph correctly represents the equation  y=−4x−3? guys me iam not trying to fail summer school and will offer 40 points for who ever me with the next 3 problems and will give brainlest

0.75,1.75,2.75,3.75 is arithmetic or geometric?