Answer:
answer c: the exact form is like that
1/100000000
and the decimal form is like that
1 . 10^{-8}
answer d: the exact form is like that
1/ 1000000000
and the decimal form is like that
1 . 10^{-9)
answer e: the exact form is like that
1/1000000
and the decimal form is like that
1 . 10^{-6}
Explanation:
the point between operations is multiplication