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.
The Exam. The AP Stat exam has 2 sections that take 90 minutes each. The first section is 40 multiple choice. questions, and the second section is 6 free response questions. Each section counts for half of the. overall score. The last free response question counts for 25% of the Section II score.