An unknown data set has a standard deviation of 10. what is the standard deviation when each value in the data set is multiplied by 5?

Two blends of tea are mixed to make a blend that will be sold at the fair. black tea sells for $2.20 per pound and orange pekoe tea sells for $3.00 per pound. how much of each should be used to obtain a 4lb blend selling for $2.50 per pound?

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.