Suppose some computations were done on a calculator.
The result displayed was 2.159E- 40 for one computation.
The result displayed was 2E29 for another computation.
Write these numbers in scientific notation.
The first result, 2.159E- 40, in scientific notation is 2.159 x 10^-40.
The second result, 2E29, in scientific notation is 2 x 10^29.