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.
Theyâre used to determine if you will receive college credit for the tests you passed. AP tests are scored 1 to 5 (or 1 to 6, depending on the test), and although a score of 3 is considered passing, some schools require a 4 or 5 for you to receive college credit. SAT subject tests, on the other hand, are often required or strongly recommended when applying to some of the more selective colleges.