Add 7.3×10^7+1.8×10^7 . Which is the correct sum?(1 point) Responses 9.1×10^7 9.1 times 10 superscript 7 baseline 9.1+10^7 9.1 plus 10 superscript 7 baseline 9.1×1014 9.1 times 10 superscript 14 baseline 8.1×10^7 8.1 times 10 superscript 7 baseline Skip to navigation page 16 of 16

Answer 1

To add \(7.3 \times 10^7\) and \(1.8 \times 10^7\), you can combine the coefficients (the numbers in front) because they both have the same exponent.

\[ 7.3 \times 10^7 + 1.8 \times 10^7 = (7.3 + 1.8) \times 10^7 = 9.1 \times 10^7 \]

So, the correct sum is:

9.1 × 10^7