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.
exists and is an alternate of . Advanced Placement, or AP classes are high school classes that can qualify for college credit at most accredited American universities. The credit received depends on the policy of the accepting university, the grade received, and the grade received on a standardized test taken at the completion of the class. Pre-AP classes are advanced cirriculum middle school classes designed to prepare the students for the AP classes in high school.