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 stands for Advanced Placement, and is a branch of the College Board franchise (same corporation that does SAT, etc.). AP Classes are college level classes that high schoolâ¦ students may take, pass an exam for, and receive college credit for. AP exams are scored on a scale of 1-5 (1=Fail, 5=Highly qualified).