Suppose that a normal distribution has a mean of 20 and a standard deviation of 4. What is the z-score of 13?

Floyd is an aspiring music artist. He has a record contract that pays him a base rate of $200 a month and an additional $12 for each album that he sells. Last month he earned a total of $644. Write an equation

What is 3/22 tines 33

Gill rolls a number cube 78 times. How many times can he expect to roll an odd number greater than 1?

Add or subtract x/x^2-4 - 2/x^2-4

Tricia had 4 1/8 yards of fabric to make curtains. When she finished she had 2 3/8 yards of frabric left. She said she used 2 2/8 yards of fabric for the curtains. do you agree? explain

What is 66% of 1,000 plus 7.5% tax

if a committee of 4 is to be chosen at random from the class of 11 students what is the probability of any particular commuter being selected. (fraction form)

Complete this statement 36x^3a + 45xa^2=9a ()

80% of what is 21.6? i

Explain how the bar model was used