Which is the correct simplification of Start Fraction 5.4 times 10 superscript 12 baseline Over 1.2 times 10 superscript 3 baseline End Fraction written in scientific notation?
(1 point)
Responses
4.5 × 107
4.5 × 10 7
4.5 × 109
4.5 × 10 9
45 × 106
45 × 10 6
6.48 × 107