You are in a chemistry class. Your teacher asks you to calculate the molecular weight of a compound using scientific notation. The numbers are small and large: 6.022 × 10²³ (Avogadro's number). Your regular calculator cannot handle this easily. You need a scientific calculator. A scientific calculator is a specialized tool that performs advanced mathematical functions beyond basic arithmetic. It handles exponents, trigonometry, logarithms, and scientific notation—calculations essential for science, engineering, and higher mathematics. Scientific calculators are used by students, scientists, engineers, accountants, and professionals who work with complex mathematical problems daily. In this comprehensive guide, we will explore what scientific calculators are, their functions, how to use them correctly, and when they are necessary. 1. What is a Scientific Calculator? A scientific calculator is a calculator that performs advanced mathematical functions beyond addition, subtraction, mu...