Ill give u a brainliest if its correct!!

Find the zeros of the function f(x) = x² - 4x - 21

Factor p 2 + 18p + 32. (p+ 4)(p + 8) (p + 2)p+ 16) (p + 16)2

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

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?