If you are currently using a gas or electric pool heater, the savings from solar pool heating system will pay for itself in 2-3 years of installation. For example, the average system costs about $5,500 and it typically costs about $2,000 a year to heat a pool with gas.
In the United States, enrollment in AP Statistics classes has increased at a higher rate than in any other AP class. Students may receive college credit or upper-level college course placement upon the successful completion of a three-hour exam ordinarily administered in May.
About the AP U.S. Government Test: The exam is 2 hours and 25 minutes long, and is divided into two sections. The AP Government Multiple Choice section is 45 minutes long and has 60 questions. Each question has five possible answers, and no points are deducted for incorrect answers.