What number is 0.001 more than 3.9?

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.

Can someone me and plz do the problem

Simplify 24÷(-2)(3)+7 a. -29 b. 3 c. 11