according to the national vital statistics report, there were 3,855,500 babies born in the us in 2017. find the minimum samples size required to be 90% certain that the sample mean weight of newborn babies is within 100 grams of the true mean when the population standard deviation is 600 grams.

Ms.ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms.ortiz charge per kilogram of tomatoes to make on a load of tomatoes?