If x is an integer and 6.1 × 10^x is less than 620 what is the greatest possible value for x?	Choose the correct choice
A) 2 B) 6 C) 5 D) 4 E) 3

Rationale: if x = 2 6.1 × 10 ^ 2 = 610 < 620 so , x = 2 answer : a
Answer: A