Jordan says that from the information supplied in the diagram, she can conclude that r is on the perpendicular bisector of qs. robert disagrees. is either of them correct? explain your reasoning

Will give brainliest sum of arithmetic series (sigma notation) find the numerical answer to the summation given below. (image shown below)

If you answer right ill give brainliest, : )

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?