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3 years ago

What is the area of a circle if the circumference is 16 pi cm

Mathematics

1 answer:

DochEvi [55]3 years ago

7 0

Answer:64pi

Step-by-step explanation:

Circumference(c)=16pi

Circumference(c)=2 x pi x radius(r)

Substituting we get

16pi=2 x pi x r

Divide both sides by 2pi

16pi/2pi=(2xpixr)/2pi

8=r

Radius(r)=8cm

Area(a)=pi x r^2

a=pi x 8^2

a=64pi

Therefore area of the circle=64pi

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Oduvanchick [21]

Answer:

H0: p = 0.1 and Ha: p > 0.1

Step-by-step explanation:

At the null hypothesis, we test if the mean or proportion is equal to a certain value.

At the alternate hypothesis, we test if the mean or proportion is less than, more than, or different of the value tested at the null hypothesis.

A quality control inspector wants to determine if more than 10% of all shells contain just one peanut.

The value of 10% = 0.1 is tested, which means that the null hypothesis is $H_{0}: p = 0.1$

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3 years ago

Help me with this please.

Maurinko [17]

Answer:

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Step-by-step explanation:

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4 years ago

Given a function described as equation y=3x+4, what is y when x is 1,2 and 3?

koban [17]

Answer:

x=1 y= 7

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Step-by-step explanation:

y=3x+4

y=3(1)+4

y=3(2)+4

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y=3(3)+4

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3 years ago

Read 2 more answers

What is the value of m,the points (2,3),(3,6)and (m,12) are collinear....Please y'all help me out

timurjin [86]

Answer:

m = 5

Step-by-step explanation:

Since the points are collinear, they all lie on the same line and have the same slope between them.

Calculate the slope m using the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (2, 3) and (x₂, y₂ ) = (3, 6)

m = $\frac{6-3}{3-2}$ = $\frac{3}{1}$ = 3

Now calculate the slope using 2 other points and equate to 3

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m = $\frac{12-6}{m-3}$ = $\frac{6}{m-3}$ = 3 ( multiply both sides by m - 3 )

6 = 3(m - 3) ← divide both sides by 3

2 = m - 3 ( add 3 to both sides )

5 = m

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3 years ago

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F(x) = 17 - 2x<br> Find f(a + 7)

Fudgin [204]

Answer:

-2a + 3

Step-by-step explanation:

We can substitute a + 7 for x:

f(a + 7) = 17 - 2(a+7) = 17 - 2a - 14 = -2a + 3

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3 years ago