It is: 2483200
Yes because when dealing with 10 squared times 10 to the fourth power you must multiply the exponents and you will get 10 to the sixth power.
No it is ten to the negative fourth power. If the number is greater than 1 it is to a positive power, if the number is smaller thann 1 it is to a negative power.
17,200
81,990
4.61 x 106
10,000
10,000
7.4 x 10-4 = 0.00074
10,000
0.0001
10000
22.2