Michael can do a job 2 hours faster than Dennis. Together they can complete the work in 5 hours. How long would it take Michael to do the job alone? (Round your answer to the nearest tenth of an hour.)

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?