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2 years ago

Which is the best estimate for the area of the circle shown below?

Mathematics

2 answers:

serg [7]2 years ago

7 0

380 m^2
Multiply 3.14 (pie) by 121
= 379.94

Elza [17]2 years ago

3 0

Answer:

c) 380 m²

Step-by-step explanation:

A = π·r²

= 3.14×121

= 379.94

≈ 380 m²

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Sample Response: A circle measures 360 degrees, so

VARVARA [1.3K]

Answer:

A semicircle measures 180°

Half of 180º is 90º

A right angle measures 90º.

Step-by-step explanation:

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3 years ago

Plz help me with 49 & 50 plz<br><br>who can help in 2 mins will br marked as brainlientiest

S_A_V [24]

49. 100-36= how many girls in percent
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3 years ago

Solve the system using a matrix.

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Answer:

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3 years ago

Find the critical numbers of the function. (Enter your answers as a comma-separated list. Use n to denote any arbitrary integer

lyudmila [28]

$f(\theta)=10\cos\theta+5\sin^2\theta$

then the derivative is

$f'(\theta)=-10\sin\theta+10\sin\theta\cos\theta$

Critical points occur where $f'(\theta)=0$ . This happens for

$-10\sin\theta+10\sin\theta\cos\theta=0$

$-10\sin\theta(1-\cos\theta)=0$

$\implies-10\sin\theta=0\text{ or }1-\cos\theta=0$

In the first case, we find

$-10\sin\theta=0\implies\sin\theta=0\implies\theta=n\pi$

In the second,

$1-\cos\theta=0\implies\cos\theta=1\implies\theta=2n\pi$

So all the critical points occur at multiples of $\pi$ , or $n\pi$ . (This includes all the even multiples of $\pi$ .)

3 0

3 years ago

Please explain step by step for 0.67÷0.3=?

pentagon [3]

Multiply each of the numbers by a ten to a power that they both become whole numbers.

0.67 * $10^2$ = 67
0.3 * $10^2$ = 30

Divide as usual.

67 / 30 = 2 $\frac{1}{3}$

So, the answer is 2 1/3.

3 0

3 years ago