Datexx DS-991ES 4-Line FX-991ES Compatible Dual Power Scientific Calculator with Natural Textbook Display

Approved for use on SAT, ACT and AP exams! Four line alphanumeric 10+2 digit display. Natural textbook display. Shows formula and results as they appear in textbooks. 410 functions. 15 digit internal calculations. Last answer memory. Replay and correct. Equation solving. Includes quadratic, cubic, and simultaneous with 2-3 unknowns. Statistical calculations. Includes means, variance, standard deviation, probability distribution, regression, linear, logarithmic, exponential, power, inverse and quadratic.