Find (9.3 × 106) + (1.8 × 104). Express your answer in scientific notation.
a 1.674 × 1011
b 9.318 × 106
c 1.11 × 104
d 7.5 × 102
The correct answer is a) 1.674 × 10^11
(9.3 × 10^6) + (1.8 × 10^4) = 9.3 × 10^6 + 0.018 × 10^6 = 9.318 × 10^6 = 9.318 × 10^6
Therefore, the answer is 1.674 × 10^11.