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kirill [66]
3 years ago
13

 Ill Mark Brainliest if you answer correctly. The figure below shows a shaded circular region inside a larger circle:

Mathematics
1 answer:
pogonyaev3 years ago
8 0

First we have to find the areas of both circle using the formula

Area = \pi r^2

For larger circle,

Area=  \pi(5)^2 = 25 \pi

For smaller circle,

Area = \pi (4)^2 = 16 \pi

Required probability

= \frac{25 \pi -16 \pi}{25 \pi} *100 = \frac{9}{25}*100 = 36%

Correct option is the second option .

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Sales The rate of increase in sales S (in thousands of units) of a product is proportional to the current level of sales and inv
DIA [1.3K]

Answer:

S = 50000/5^(1/t)

Step-by-step explanation:

Since we have that the rate of increase in sales S (in thousands of units) of a product is proportional to the current level of sales and inversely proportional to the square of the time t.

And ds/dt means the rate of increase in S

dS/dt ∝ S/t².

Now,

dS/dt = kS/t². Where k is the constant of proportionality

Solving this equation,

dS/S = kdt/t²

Taking the integral of both sides,

∫ dS/S = ∫ kdt/t²

Integrating both sides, we get,

lnS = - k/t + C

As t --> ∞,

ln50000 = C.

So,

lnS = - k/t + ln50000.

Next,

When t = 1, S = 10000.

We have,

ln10000 = - k + ln50000.

k = ln50000 - ln10000.

k = ln5.

Now,

lnS = - 1/t. ln5 + ln50000.

Taking the exponential of both sides, we get,

S = 50000/5^(1/t)

5 0
3 years ago
What is the average of 0,1,3,2
astraxan [27]
I'm gonna say the average is 1.5 because is the sum of the elements divided by the number of elements.

0+1+3+2=6
6/4= 1.5
3 0
3 years ago
Please see attachment!!! The formula for finding the area of a rectangle is
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Answer:

36cm^2

Step-by-step explanation:

4cm×9cm=36cm^2

5 0
3 years ago
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Answer:

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Step-by-step explanation:

5 0
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