Handheld scientific calculator offers a two-line 10+2-digit display, built-in formula, 139 scientific and math functions and 38 built-in formulas. Ideal for algebra I and II, chemistry, geometry, physics, statistics and trigonometry. Functions include chain multiplication/division, constant multiplication/division/percentage calculations, exponential, factorial, hyperbolic, logarithmic, mean, square, standard deviation of population, standard deviation of sample, reciprocal calculations, fraction calculation, angles conversion, DRG mode calculation, trigonometric calculation, coordination conversion, permutations, combinations, correlation coefficient, random number generation, last digit recall and last answer recall. Automatically powers off in seven minutes when not in use.