It’s incorrect thanks a lot g

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?

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = x^2 + 7x + 10