Complete Question
The model that describes the number of bacteria in a culture after t days has just been updated from
to
What implications can you draw from this information?
A The growth rate of the bacteria in the culture is 30% per day instead of
20% per day.
B The final number of bacteria is 3 times as much of the initial value instead
of 2 times as much.
C The initial number of bacteria is 3 instead of 2
D The number of bacteria triples every day instead of doubling every day
E None of the above.
Answer:
The correct option is D
Step-by-step explanation:
From the question we are told that
The first model is
The updated model is ![P(t) = 7(3)^t](https://tex.z-dn.net/?f=P%28t%29%20%3D%207%283%29%5Et)
Generally looking the two models that define the number of bacteria we see that at the for the first model that the number is being doubled everyday for example if the time is equal to 1 day we have that
Here we see that the constant 7 is being double but in the new model we can see that the number is being triple everyday , taking the same example with t = 1
=>
Here we see that the constant 7 is being triple for each day
Hence the implication of the model change is that the number of bacteria will be tripled everyday instead of being doubled everyday
Answer:
Step-by-step explanation:
196*36%=70.56 feet
He rounded the percent to 40% and the number to 200.
You need to understand that you're solving for the average, which you already know: 90. Since you know the values of the first three exams, and you know what your final value needs to be, just set up the problem like you would any time you're averaging something.
Solving for the average is simple:
Add up all of the exam scores and divide that number by the number of exams you took.
(87 + 88 + 92) / 3 = your average if you didn't count that fourth exam.
Since you know you have that fourth exam, just substitute it into the total value as an unknown, X:
(87 + 88 + 92 + X) / 4 = 90
Now you need to solve for X, the unknown:
87
+
88
+
92
+
X
4
(4) = 90 (4)
Multiplying for four on each side cancels out the fraction.
So now you have:
87 + 88 + 92 + X = 360
This can be simplified as:
267 + X = 360
Negating the 267 on each side will isolate the X value, and give you your final answer:
X = 93
Now that you have an answer, ask yourself, "does it make sense?"
I say that it does, because there were two tests that were below average, and one that was just slightly above average. So, it makes sense that you'd want to have a higher-ish test score on the fourth exam.
Well 26-5=21
And then you divide by 3(because it was tripled so) 21/3=7
The answer will be the choice number will be the first one 3x+4=-2x-1