Help, due at 6:00, will give brainliest. HELP ASAP

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

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.)

Find the slope of the line that passes through the points (0, 0) and (-2, -3). 2/3 3/2 -3/2