Question 741431
A scientist notes the bacteria count in a petrie dish is 50.
 Two hours later, he notes the count has increased to 80.
50^(2g) = 80
Find the growth rate
 If this rate of growth continues, how much more time will it take for the bacteria count to reach 100? without logarithm?
:
Using the ratio of change to ratio of hrs
let t = time to reach 100
{{{((80-50))/((100-50))}}} = {{{2/t}}}
{{{30/50}}} = {{{2/t}}}
30t = 50*2
30t = 100
t = 100/30
t = 3{{{1/3}}} hrs
But it asks how much more time
3{{{1/3}}} - 2 = 1{{{1/3}}} hrs to go from 80 to 100 count