Joann bought 2 3/4 pounds of flour Victoria bought one and a half times as much as Jillian how many pounds of flour did Victoria buy

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab