1. A pilot is testing a new experimental craft. The cruising speed is classified information. In a test the jet travels 12,000 miles. The pilot revealed that if he had increased his speed 1000 mph, the total trip would have taken 1 hour less. Determine the cruising speed of the jet. The jet was traveling at ____ mph.
2. Two young college graduates opened a chain of print shops. The chain expanded rapidly during the early 1990s and many new stores were opened. The number of print shops in operation during any year from 1990 to 2005 is given by the equation y=2.5x^2+17.5x+143 where x is the number of years since 1990. How many print shops were there in 1993? There were ______ print shops in 1993.
