1*10-9 = 0.000000001
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10 to the power of minus 1 is equal to 1 divided by 10, which is 0.1. This can be calculated by taking the reciprocal of 10 raised to the power of 1, which is 10. Therefore, 10 to the power of minus 1 is equivalent to 0.1.
8.0 × 10-9 written in regular notation is: 0.0000000080
-10 minus -10 is 0.
84 minus -10 is 94.
109 is equal to 1billion so 3.65billion 3,650,000,000 is your answer