Question

Approximately how many times greater is 1.2×103 than 4×10−1 ?

3

30

300

3000

Answer 1

3000

Explanation:

Answer 2

1.2 * 10^3 means shift the decimal 3 places right. 1200 which is 1200

4 * 10^-1 can be handled 2 ways 10 to the minus 1 in the denominator

becomes 10^1 in the numerator. notice the sign change on the 10 when you

shift it ....it becomes plus


1200 * 10 ^ 1
12000



now you are still left with 4 in the denominator
12000/4 = 3000


So your answer would be D. 3000