Question 1149566
{{{y=p*b^x}}}

-

{{{35=15*b^5}}}

{{{7=3*b^5}}}

{{{b^5=7/3}}}

{{{b=1.18466}}}

Model which could be used:  {{{highlight(y=15(1.18466)^x)}}}

-


-------------------------------------------------------------------
b) How many bacteria were there 3 hours after the experiment began?
-------------------------------------------------------------------


Plug-in 3 for x, and calculate the result.



---------------------------------------------------------------
c) When will the population reach 60?
-------------------------------------------------------------------


{{{log((y))=log((15))+log((1.18466^x))}}}

{{{log((y))-log((15))=x*log((1.18466))}}}

{{{x=(log((y))-log((15)))/log((1.18466))}}}

{{{substituting}}}{{{60}}}{{{for}}}{{{y}}},

{{{x=(log((60/15)))/log((1.18466))}}}

{{{x=log((4))/log((1.18466))}}}
{{{You}}}{{{finish}}}{{{this}}}.