An arc on a circle measures 125°. The measure of the central angle, in radians, is within which range?

15 points ! ~ see if you know the answer to both you!

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

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?