C. 6.81x10^-4
It is negative 4 because the 6 is 4 digits away from the first 0.
Scientific notation has one number and then the decimal place so it can not be A or E.
Geography would be useful planning because it helps the builders determine where certain public facilities, such as parks and restaurants, and transportation, and buildings would be located.
Answer:
i don't think i understand the question
Explanation: