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.
Read on for our guide to the SATâs length, individual section times and section ordering, and learn how to deal with fatigue during the test. The SAT is 3 hours (180 minutes) long in total, not including the optional essay or breaks. With the optional essay, the total test time is 3 hours and 50 minutes.