Jeff is pouring concrete for his patio. The patio will measure 20 feet long and 30 feet wide. They had to dig 2 feet down to firm soil. Choose the integer that represents how far they had to dig.

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

Ellie spent $88.79 at the computer stote. she had $44.50 left to buy a cool hat. how much money did she originally have? write and solve an equation to answer the question.

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.)