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mathgogocart wrote:

according to bob bundy(thank you)

the Awser is 25

thanks for your help

bob bundy wrote:

hi cat1kf2

Welcome to the forum.

Work backwards:

After 3 days ....................1600

12 hours earlier................ 1600 ÷ 2

after two days .................. ÷ 2 again

12 hours earlier ................ ÷ 2 again

After one day ................... ÷ 2 again

12 hours ealier ................. ÷ 2 again

start ................................ ÷ 2 again

Bob

Thanks for your help Bob

**cat1kf2**- Replies: 8

After 3 days, there are 1,600 bacteria. How many bacteria were there at the beginning of the first day? Use the work backward strategy.

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