Angle that is in letter k

Really need on these. i have no idea what to do

Jim makes $10.35 per hour. write an equation that jim can use to calculate his pay.

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.