very hard.. pls don't answer if you don't understand it fully. i will report and delete your answer if its wrong.

The contents of 3838 cans of coke have a mean of x¯¯¯=12.15x¯=12.15. assume the contents of cans of coke have a normal distribution with standard deviation of σ=0.12.σ=0.12. find the value of the test statistic zz for the claim that the population mean is μ=12.μ=12.

Find the missing factor. write your answer inexponential form.9^2=9^4×

What is perpendicular to y=-1/2x+11