Find AB given A(-1,4) and B(-4,1). Answer in simplest radical form. If answer is not a whole number, do not use decimals.
Examples: if answer is 23. then type 2sqrt3. If answer is v2, then type sqrt2.

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

How do your peer relationships affect your overall health status? what can you do to improve your peer relationships?

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.