Answer:
standard form: 66937
scientific notation: 6.6937 * 10^4
Explanation:
first, convert both answers to standard form: 6.7 * 10^4 = 67000 and 6.3 * 10 = 63
67000 - 63 = 66937
if you want the answer in scientific notation, it is 6.6937 * 10^4
hope this helps! <3