Arectangle board is 1200 millimeters long and 900j mm wide what is the area of the board in square meters

Which expression is equivalent to sq-80

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?

2/3(-6y+9x) expand each expression using the distributive property