Evaluate Using Scientific Notation (910^7)(710^9)

$(9 \cdot 10^{7}) (7 \cdot 10^{9})$

Step 1

Multiply $9$ by $7$ .

$63 (10^{7} \cdot 10^{9})$

Step 2

Multiply $10^{7}$ by $10^{9}$ by adding the exponents.

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$63 \cdot 10^{7 + 9}$

Add $7$ and $9$ .

$63 \cdot 10^{16}$

Step 3

Move the decimal point in $63$ to the left by $1$ place and increase the power of $10^{16}$ by $1$ .

$6.3 \cdot 10^{17}$

Evaluate Using Scientific Notation (9*10^7)(7*10^9)