These online questions are way harded than the ones at in person school! please answer!!

Determine the quotient of the following expression. (15n^2-27n) / 3

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.

Will give a: 122 b: 90 c: 48 d: 180