Plz answer the question plz​

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.

Use set buikder notation to represent the following set: {, -2, -1, 0}

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9