Apopulation is normal with a variance of 13. suppose you wish to estimate the population mean. find the sample size needed to assure with 68.26 percent confidence that the sample mean will not differ from the population mean by more than 2 units

Apath 3 m wide runs around the inside of a square park inside 60 m.find the area of the path.pls

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)