Should i send this to my teacher?

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. explain in words how you plot the point (4, −2) in a rectangular coordinate system.

Drag each equation to the correct location on the table. for each equation, determine the number of solutions and place on the appropriate field in the table.