e) 0,0000000001 $10^{-10}$
f) 0,0000001 $10^{-4}$

Answer

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Answer

f) $\boxed{1.0 \times 10^{-7}}$

Steps

Step 1 ：Convert the given decimal numbers into scientific notation:

Step 2 ：e) 0.0000000001 = $1.0 \times 10^{-10}$

Step 3 ：f) 0.0000001 = $1.0 \times 10^{-7}$

Step 4 ：$\boxed{\text{Final Answer:}}$

Step 5 ：e) $\boxed{1.0 \times 10^{-10}}$

Step 6 ：f) $\boxed{1.0 \times 10^{-7}}$