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nlexa [21]
3 years ago
14

Explain why you would multiply 60 by 4 to find how many minutes are in 4 hours.

Mathematics
1 answer:
ycow [4]3 years ago
6 0

Answer: 240

Step-by-step explanation:there are 60 mins in each hour .

So multiply 60 and 4 because in each hour there is 60 minutes and there is 4 hours

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See below

Step-by-step explanation:

Figure A has a square cut out into it as figure B has a trapezoid cut out into it.

A reflection is mirroring an image, this means that the image must be identical to its reflected image.

Because figure A and B have different shapes cut into it they are not identical and can therefore not be reflections.

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Which statement explains how the lines x + y = 2 and y = x + 4 are related?
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3 years ago
The population of bacteria in a culture grows at a rate proportional to the number of bacteria present at time t. After 3 hours
Arada [10]

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.

\frac{dN}{dt} = k N

\frac{dN}{N}  = k dt

Integrating both side we get

㏑ N = k t + C ------- (1)

Now given that after 3 hours it is observed that 500 bacteria are present and after 10 hours 5000 bacteria are present.

⇒ ㏑ 500 = 3 k + C -------- (2)

⇒ ㏑ 5000 = 10 k + C ------ (3)

⇒ ㏑ 5000 -  ㏑ 500 = 7 k

⇒ ㏑\frac{5000}{500} = 7 k

⇒  ㏑ 10 = 7 k

⇒ k = 0.329

Put this value of k in equation (2),

⇒ ㏑ 500 = 3 × 0.329 + C

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Put this value of C in equation 1 we get,

⇒ ㏑ N = k t + 5.23

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Thus the number of bacteria at initial = 187

8 0
3 years ago
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