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.
17,200
81,990
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.
4.61 x 106
10,000
10,000
7.4 x 10-4 = 0.00074
10,000
10000
0.0001
Five times ten to the third power is 5000 and three times ten to the second power is 300; 5000 + 300 = 5300.