After special medicine is introduced into a peril dish full of bacteria, the number of bacteria remaining in the dish decreases
rapidly. The relationship between the elapsed time t, in seconds, and the number of bacteria, N(t), in the Petri dish is modeled by the following function:
N(t)=50,000•(0.5) t/4.3
The Petri dish loses %50 of bacteria every ____ seconds
N(t)=50,000•(0.5) t/4.3
The Petri dish loses %50 of bacteria every ____ seconds
2 answers:
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Answer: the answer is in the photo pls check this out and hope this helps can u give me brainliest
Step-by-step explanation:
We have the equation
Let's complete the square, to do it let's add and subtract 25 on the right side
Now we can have y in function of x
Now we can already identify the vertex because it's in the vertex form:
Where the vertex is
As we can see, h = 5 and k = -2, then the vertex is
Now we can continue and find the focus, the focus is
We have a = 1/20, therefore
The focus is
And the last one, the directrix, it's
Then
Hence the correct answer is: vertex (5, -2); focus (5, 3); directrix y = -7