Answer:
7 x 10 ^ -6 power i believe is the right answer
Explanation:
When putting a decimal such as 0.0000000009 in scientific notation the exponent will be negative. To figure out how to write scientific notation just find the number that you need to multiply by to get the number we have now. To get to 0.000007 we need to find 7 and multiply that by a negative exponent so that it turns into a decimal. We see that the decimal point from the number 7 moves over 6 times to the left to get 0.000007 meaning that our exponent is -6.