The phrase "a satisfactory answer for" is correct and usable in written English.
You can use it when discussing whether a response meets the expectations or needs of a particular question or situation.
Example: "The committee was looking for a satisfactory answer for the concerns raised by the community."
Alternatives: "an acceptable response to" or "a suitable reply for".
He never gave me a satisfactory answer for why he was so open.
Having lunch or shopping is not a satisfactory answer for our threatening presence.
"We're working on it with everything we've got," is not a satisfactory answer for that man.
No attempts were made to refine the model since it also gives a satisfactory answer for the ion steady state, as shown in Fig. 1d.
While scores of studies from around the world have shown conclusively that vaccines do not cause autism, that is often not a satisfactory answer for Somali American parents.
In one study elite athletes attempted to get a satisfactory answer for their tiredness and recorded their answers on questionnaires [185].
For what its worth, I never got a satisfactory answer from either number.
One important reason for asking, and for giving a satisfactory answer to, this question is a concern that the child's moral status should be adequately secured and protected.
American officials are not optimistic that the Council will come up with a satisfactory answer to Washington's demands for relief from the high duties that have drastically cut United States sales of frozen poultry to West Germany.
Despite a well formulated, 35 year-old framework of hierarchical, galaxy formation in a Universe dominated by dark matter and dark energy, this basic question, which is central to the study of galaxy evolution, still begs for a satisfactory answer.
Because if an alien visitor were to clatter onto Grand Avenue and ask stunned passersby to describe jazz, they could have pointed to the hall for a satisfactory answer.
