Answer:
7.77×10^4=77,700
Step-by-step explanation:
10^4 is 10,000, since there are 4 zeros in 10,000, move the decimal in 7.77 4 spaces to the right.
1: 77.7
2: 777.
3: 7,770.
4 77,700.
Side note: This trick ONLY works with +/-10^x value. If the value is positive the decimal moves to the right, and if the value is negative the decimal moves to the left.
Example: 7.77×(-10)^3=.00777
(-10)×(-10)×(-10)=(-10)^3= -1000
1: .777
2: .0777
3: .00777