Question

Approximately how many times greater is 5×108 than 8×105 ?

62.5
625
6250
625,000

Answer 1

it would be 62.5, I am pretty sure

Answer 2

Answer: 625

Explanation:

We have the numbers 5x10^8 and 8x10^5

the relation between them can be obtained by:

(5x10^8)/(8x10^5)

now, we can solve this as:

(5/8)*(10^8/10^5) = (5/8)x10^(8-5) = (5/8)x10^3 = 0.625x10^3 = 625

where we used that:

(a^b)/(a^c) = a^(b-c)

then the correct option is the second one.