Lizzy bought 4 bags of apples at the store. her mom gave her 8 more apples. now lizzy has 36 apples. how many apples were in each bag?

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?

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?