Question

How I can answer this question, NO LINKS, if you answer correctly I will give u brainliest!

Answer 1

Answer:

6.73E-8 I think

Step-by-step explanation:

Answer 2

Answer:

$7.4 \times {10}^{ - 8} - 6.7 \times {10}^{ - 9} \\ = (7.4 - 6.7) {10}^{ - 8 + ( - 9)} \\ = 0.7 \times {10}^{-17}$