Arandom sample of the price of gasoline from 2020 gas stations in a region gives the statistics below. complete parts a. through c). y overbaryequals=$4.494.49, sequals=$0.260.26 a) find a 9595% confidence interval for the mean price of regular gasoline in that region.

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Frank is lending $1,000 to sarah for two years. frank and sarah agree that frank should earn a real return of 4 percent per year. instructions: a. the cpi (times 100) is 100 at the time that frank makes the loan. it is expected to be 113 in one year and 127.7 in two years. what nominal rate of interest should frank charge sarah?

Apack of gum would be considered a(n) necessity luxury item small ticket item unaccountable expense