Pre-Algebra Examples

$2.1 \times 10^{- 7} \cdot (9 \times 10^{- 7})$

Step 1

Since the exponent of the scientific notation is negative, move the decimal point $7$ places to the left.

$0.00000021$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$