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pogonyaev
3 years ago
8

After a special medicine is introduced into a petri dish full of bacteria, the number of bacteria remaining in the dish decrease

s 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)=1000⋅(12)^t/5.5
Complete the following sentence about the half-life of the bacteria culture.
The number of bacteria is halved every ___ seconds.
Mathematics
2 answers:
Digiron [165]3 years ago
5 0

Answer:

the answer is 5.5

Ilia_Sergeevich [38]3 years ago
3 0

Answer:

4.3

Step-by-step explanation:

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katen-ka-za [31]

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Step-by-step explanation:

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3 years ago
The correct expression for a number which is 9 times as big as the number obtained after p has been increased
defon

Answer:

9(p + 4)

Step-by-step explanation:

One of the unknown variable is p.

First of all, we know that the number is 9 times as big (multiplication) as the new number obtained through the addition of four to p i.e (p + 4).

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svetlana [45]
The answer is in the photo

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2 years ago
What is the sum of the polynomials? (8x2-9y2-4x)+(x2-3y2-7x)
White raven [17]
The sum of the polynomials (8x²-9y²-4x)+(x²-3y²<span>-7x) is:

 1. You must add the terms whose variables and exponents are the same. 
 2. Let's rewrite the polynomials:
</span>
 (8x²-9y²-4x)+(x²-3y²-7x)
 8x²-9y²-4x+x²-3y²-7x
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 3. Therefore, the result is:

 9x²-11x-12y²

 3. <span>What is the sum of the polynomials?

 The answer is: </span>9x²-11x-12y²
3 0
3 years ago
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