add 7.3 x 10^7 + 1.8 x 10^7 which is the correct sum?

Answer 1

To add the numbers \(7.3 \times 10^7\) and \(1.8 \times 10^7\), you can factor out the common \(10^7\):

\[ 7.3 \times 10^7 + 1.8 \times 10^7 = (7.3 + 1.8) \times 10^7 \]

Now, perform the addition inside the parentheses:

\[ 7.3 + 1.8 = 9.1 \]

So, the sum becomes:

\[ 9.1 \times 10^7 \]

Thus, the correct sum is:

\[ 9.1 \times 10^7 \]