Factor. (If the expression is non factorable over the integers, enter NONFACTORABLE.) 256a4 − b4

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?

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?