A senator wishes to estimate the proportion of United States voters who favor abolishing the Electoral College. How large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 3%?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

A(1,1) b(-3,0) c(-4,-1) d(3,-2) drag it to correct position

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.