50000 = 510000 = 510^4
when you have a number like 10000 or 100, that number is a power of ten, so you can write it like 10^n, where n is the number of zeros after the 1
that means:
1000 = 10^3
10 = 10^1
1 = 10^0 (but it would be silly to write it like that. just write 1. lol)
so yeah, back to the original question, we take 50000 and show it as 510000 so we can write 10000 with exponents. 10000 has 4 zeros so 10^4. 510000=5*10^4
