Mega Movies hosted a film premiere on Friday night. They charged $9 for adults and $5 for children. One hundred fifty-nine adult
1 answer:
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Answer:
a)
b) 334,858 bacteria
c) 4.67 hours
d) 2 hours
Step-by-step explanation:
a) Initial number of bacteria is the coefficient, that is, 250. And the growth rate is the coefficient besides “t”: 0.15. It’s rate of growth because of its positive sign; when it’s negative, it’s taken as rate of decay.
Another way to see that is the following:
Initial number of bacteria is N(0), which implies . And
. The process is:
b) After 2 days means . So, we just replace and operate:
c)
d)
The given system is
Given that y = y, let's combine the equations
Let's solve for x
Then, we find y
The solution is (2, -3).
The image below shows the solution graphically.
