Define-What is this notation on the calculator:
1.388e-2
Define-Why use Scientific Notation?
Define-How do you choose what place value to estimate to?
1.388e-2 is a notation in scientific notation. It represents the number 0.01388.
Scientific notation is used to represent very large or very small numbers in a more compact and easier to read format. It is especially useful when working with numbers with many zeros or when comparing numbers with different orders of magnitude.
When choosing what place value to estimate to when using scientific notation, you typically want to round to the nearest significant digit. This is usually the first non-zero digit in the number. For example, in the number 6.022 x 10^23, the significant digit is 6.022. So you would round to the nearest place value based on the digit 6.