How many hours will it take a culture of bacteria to increase from 20 to 2000 if the growth rate per hour is 85%

Mathematics

1 answer:

galben [10]3 years ago

3 0

Answer:

Approximately

7.5

hours

Step-by-step explanation:

Explanation:

We are trying to determine the value of

in the compound growth formula

XXX

(

0.85

)

2000

or, simplified:

XXX

1.85

100

Taking the

log

1.85

of both sides:

XXX

log

1.85

100

With the aid of my trusty spreadsheet:

XXX

≈

7.48582192

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The answer is: [D]: 11 1/2 .
___________________________________________________________
Explanation:
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2 7/8 ÷ 1/4 =

23/8 ÷ 1/4 = 23/8 * 4/1 ; The "4" cancels to a "1"; and the "8"
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