The average lifetime of a light bulb is 3,000 hours with a standard deviation of 696 hours. A
simple random sample of 36 bulbs is taken

(a) calculate the molarity of a solution that contains 0.0345 mol nh4cl in 400 ml of solution. (b) how many moles of hno3 are present in 35.0 ml of a 2.20 m solution of nitric acid? (c) how many milliliters of 1.50 m koh solution are needed to supply 0.125 mil of koh ?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

How is this equation completed? i cannot find any examples in the book.