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weeeeeb [17]
2 years ago
14

Plot the points A(7,1), B(-2, 3), C(1, -7) on the coordinate axes below. State the

Mathematics
1 answer:
Tanzania [10]2 years ago
4 0

      A             B

D              C

vectors

AB = DC

AB (-2-7 ; 3-1) => AB (-9 ; 2)

DC (1-x : -7-y)

1 - x = -9 => x = 10

-7-y = 2 => y = -9

D(10 ; -9)

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The population of bacteria in a culture grows at a rate proportional to the number of bacteria present at time t. After 3 hours
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Answer:

The number of bacteria at initial = 187

Step-by-step explanation:

Given that the population of bacteria in a culture grows at a rate proportional to the number of bacteria present at time t.

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㏑ N = k t + C ------- (1)

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⇒ ㏑ 500 = 3 k + C -------- (2)

⇒ ㏑ 5000 = 10 k + C ------ (3)

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⇒ ㏑\frac{5000}{500} = 7 k

⇒  ㏑ 10 = 7 k

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Put this value of k in equation (2),

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Put this value of C in equation 1 we get,

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Initially when t = 0 , then

⇒ ㏑ N = 5.23

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Answer:

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