Answer:
B, 2.5*10^5
Explanation:
Take the powers of 10 and coefficients separately. Take 3 as the numerator and 5*2.4 as denominator and get 0.25, which eliminates answers a and e. Next, we simplify the powers of 10. 10^15 as the numerator and 10^6*10^3 as the denominator and get 10^6, however, it is only 0.25 and it must be between 1 and 10 for scientific notation, making it 2.5*10^5.