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April 7th, 2014, 03:57 AM   #1
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sorry, really need some help: shrinking and expanding

hi guys, really struggling with this. if anyone could help me it would be really appreciated thanks!

Intelligent life forms from the Alzir planetary system have a unique way of
dealing with foreign stellar visitors, a shrink ray. Alzirians of have been heard
saying “A shrunken problem is no problem at all”, often after a unlucky
visitor has been shrunk. Captain Kirk and his crew met a similar fate and after
the starship Enterprise and occupants where reduced by 87% of their original size. After much diplomacy and explaining that the United Federation of Planets were peaceful explorers, the Alzirians agreed to return them to normal size. Fortunately by switching polarity the shrink ray becomes an
expansion ray. The return to normal size

(a) by what expansion factor would the Enterprise and crew need to undergo?
(b) what would be the percentage increase required?
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April 7th, 2014, 08:27 AM   #2
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I've given you some help with this on the Elementary Math board.
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