Consider these three numbers written in scientific notation: 6.5 × 103, 5.5 × 105, and 1.1 × 103. which number is the greatest, and by how many times is it greater than the smallest number?

a.
the greatest number is 5.5 × 105. it is 5 times greater than the smallest number.
b.
the greatest number is 6.5 × 103. it is 50 times greater than the smallest number.
c.
the greatest number is 5.5 × 105. it is 500 times greater than the smallest number.
d.
the greatest number is 6.5 × 103. it is 5,000 times greater than the smallest number.
e.
the greatest number is 5.5 × 105. it is 5,000 times greater than the smallest number.