Write in scientific notation: 431, 37, 0.935, 8374, 1000, 100023, 0.0051, 0.00009, 0.0471, 0.2. Write in scientific notation: 27 * 10^3, 431 * 10^(-4), 3002 * 10^5, 0.02 * 10^3, 0.00721 * 10^(-4). Put into formula and calculate. Data and result write in scientific notation.