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Rudiy27
3 years ago
14

The circumference of a circle is 75.36 cm. What is the area of the circle?

Mathematics
2 answers:
Anuta_ua [19.1K]3 years ago
7 0
The area of a circle, given the circumference, is found using this formula:

A = C²/4π

Therefore,
A ≈ 451.93 cm²
bekas [8.4K]3 years ago
7 0
451.93 is the short answer.
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Can someone help me understand this question?
JulijaS [17]
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3 0
3 years ago
3. Which relation is a function?
Pani-rosa [81]

Answer:

B

Step-by-step explanation:

Recall that functions are defined only if for each value in the domain produces one and only one value in the range.

If we view the relations in the questions as x-y coordinates, this means that for every x-value, you can only have one y-value

Lets evaluate the options:

A) we can see that for x = -3, this gives 2 possible values for y i.e (-3,4) and (-3,8) (hence this is not a function)

C) we can see that for x = 3, this gives 2 possible values for y i.e (3,-8) and (3,8) (hence this is not a function)

D) we can see that for x = -3, this gives 2 possible values for y i.e (-3,4) and (-3,8) (hence this is not a function)

the only choice where this doesn't occur is choice B

6 0
3 years ago
Differentiate the function. f(x) = sin(9 ln(x))
gayaneshka [121]

Answer: f'(x)=\dfrac{9\cos(9\ln (x))}{x}.

Step-by-step explanation:

The given function is

f(x)=\sin(9\ln (x))

Using chain rule differentiate w.r.t. x.

f'(x)=\cos(9\ln (x))\dfrac{d}{dx}(9\ln (x))      \left[\because \dfrac{d}{dx}\sin x=\cos x\right]

f'(x)=\cos(9\ln (x))\left[9\dfrac{d}{dx}(\ln (x))\right]

f'(x)=\cos(9\ln (x))\left[9\times \dfrac{1}{x}\right]       \left[\because \dfrac{d}{dx}\ln x=\dfrac{1}{x}\right]

f'(x)=\dfrac{9\cos(9\ln (x))}{x}

Therefore, f'(x)=\dfrac{9\cos(9\ln (x))}{x}.

5 0
3 years ago
I have a lot of algebra problems. Someone help me even with this one please!
inysia [295]

Answer:

8 in

I have that is the correct answer

but iam not confident

3 0
3 years ago
A landscaping company placed two orders with a nursery. First order was 5 bushes and 8 trees,and totaled $374.The second order w
Ede4ka [16]

Answer:For one bush it would be $185 and for one tree it would be $189.

Step-by-step explanation:185 + 189 = 374

8 0
3 years ago
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