Do the two triangle have the same size and shape? Justify your answer.

Which term best describes the association between variables a and b

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?

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?