A kitten is born weighing 90 grams and gains 10 grams per day for 14 days. How many days, x, will it take the kitten to double its weight? Write and solve the equation.

What number should be added to both sides of the equation to complete this square? x^2-10x=7

What are the solutions to the equation 4x2+3x=24-x

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?