Question

A certain bacterial culture is multiplying in a culture dish, doubling in size every 6 minutes. It takes exactly an hour to fill the whole dish. How long does it take to fill half the dish?

A. 54 minutes
B. 48 minutes
C. 30 minutes
D. 36 minutes

Answer 1

@radar

Answer 2

@welshfella

Answer 3

i think its c

Answer 4

think 'backwards' - in the lastt 6 minutes it doubles itself

Answer 5

ok

Answer 6

is it b?

Answer 7

NO

Answer 8

0_0 pk gosh

Answer 9

at 60 minutes it was full - 6 minutes before it was half that size...

Answer 10

lol a

Answer 11

right!

Answer 12

Heed welshfella advice.

Answer 13

sometimes you dont need too much math..

Answer 14

Yes, common sense goes a long ways.

Answer 15

yep