Answer:
number of 0's is equal to the power
Step-by-step explanation:
7 x 10^0 = 7 power is 0 so there are no 0's
7 x 10^1 = 70 power is 1 so there are is 1 0
7 x 10^2 = 700 power is 2 so there are 2 0's
7 x 10^3 = 7,000 power is 3 so there are 3 0's