What is the Square root of 125

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.

Ineed me i stuck and i don’t want to get it wrong

Aline that intersects one of two parallel lines intersects the other also always sometimes never