Describe the relationship between < 1 and <5

What is the difference between the equations of a vertical and a horizontal line?

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.2 days and a standard deviation of 1.7 days. what is the probability of spending more than 2 days in recovery? (round your answer to four decimal places.)