Scientific calculator performs 131 essential scientific, math and statistic functions to help students studying general math and science, pre-algebra, algebra and trigonometry. 10-digit, one-line LCD clearly displays digits to help prevent reading errors. Hard case protects the display and keys for safe storage and transportation. Calculator is permitted for use on SAT and PSAT/NMSQT. Battery-operated calculator also includes independent memory, constant calculation, chain calculation and more.