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krisik
09.07.2019 •
Mathematics
Karen deposited $25 in the bank on monday, $50 on wednesday, and 15 on friday. on saturday she took out $40. karen's original balance was a hundred. what is her new balance now?
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Ответ:
Ответ:
no he is not correct
Step-by-step explanation:
SA=113.04
SA=4pi*r^2
113.04=4*pi*r^2
113.04/4pi=r^2
8.995...=r^2
r= radical(8.995..)
r=2.9992...
r=3
the mistake happened when they forget to square the r in the SA formula