Answer: 640.9 x 10^6
Explanation:
To subtract (6.5 x 10^8) − (9.1 x 10^6) using scientific notation, you need to make sure that both numbers have the same exponent.
First, let's rewrite the numbers in scientific notation:
6.5 x 10^8 = 650 x 10^6
9.1 x 10^6
Since both numbers have the same exponent (10^6), you can subtract the coefficients:
650 - 9.1 = 640.9
Now, keep the common exponent of 10^6:
640.9 x 10^6
Therefore, the difference between (6.5 x 10^8) and (9.1 x 10^6) is 640.9 x 10^6.
Hope this helps