注目の話題: 義母との関わり方; 妊娠中から旦那が無理になった; 35歳以上は無理なのですか？

Science,English,and math 4th

No.211　21/04/04 07:37
燻し銀三 ( 60代 ♂ IJ7P0b ) あ+あ-

《A father of nuclear power and the estimation on Fermi》

1『Formulating a hypothesis』

...and thinking over the number of the piano tuners who are indispensable so as to tune all the pianos in Chicago.

2 『Dividing a matter into several elements』

What is a necessary data and an amount of presumption we need so as to think over the question?

The population in Chicago.

The number of people in a single household.

A ration of the household which has the piano in the whole Chicago.

A number of times on tuning the piano for a year.

A number of times on a single piano tuner who does his own....

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