64ft2 but the actual area is 68ft what is the percent error

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.

Find the multiplicative inverse of 8-12i

X+y=-4 x-y=2 use elimination with adding and subtraction