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.
AP Exams consist of multiple-choice questions and essay questions. Most exams are two to three hours long. AP courses prepare students for AP Exams as well as giving them skills and knowledge critical to success at university. However, you can take most AP Exams without taking the AP course as a prerequisite. Thousands of students like you prepare for AP Exams on their own every year.