what is the margin of error for a sample statistic for a population with a standard deviation of 6.75

Jan accidently ran 7 minutes longer than he was supposed to. write an expression for the total amount of time jan ran if she was supposed to run m minutes

How many and of which kind of roots does the equation f(x)=x3−x2−x+1

Find the degree 3 taylor polynomial p3(x) of function f(x)=(-3x+15)^(3/2) at a=2