if a tutor is reading this I need help on these sums from a practice paper a lot!!I finished the rest, but please can you do them in steps for me! I'll be really grateful. I'll study the formlae to learn them if you help me outanswer ans many as you can!

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.

Acompany wants to reduce the dimensions of its logo by one fourth to use on business cards. if the area of the original logo is 4 square inches, what is the area of the logo that will be used on the business cards?

How to use order of operation in 20 divide by 4 multiply 5 = 1