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3 years ago

Help me with this please !

Mathematics

2 answers:

saw5 [17]3 years ago

4 0

Answer:

True

Step-by-step explanation:

The circumference (C) of a circle is

C = 2πr ← r is the radius

For C = 8π, then

2πr = 8π ( divide both sides by 2π )

r = 8π ÷ 2π = 4

Hence the radius must be 4

Vedmedyk [2.9K]3 years ago

3 0

Answer:

True

Step-by-step explanation:

The formula for the circumference of a circle is:

C=2πr

So we can substitute in the numbers we have:

Radius=4, so:

C=8π (we multiplied the radius by 2)

So the statement is true.

Hope I... yeah you get it y now I've been answering your questions a lot.

I'm still gonna copyright it.

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What is the distance between (–2 and one-half, –3) and (1, –3)?

Elina [12.6K]

Answer:

3 and 1/2 units

Step-by-step explanation:

Square root of (1 - -2 and 1/2)^2 + (-3 - -3)^2

Square root of 3 and 1/2^2 + 0^2

Square root of 12.25 = 3.5

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3 years ago

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Travka [436]

Answer:

Step-by-step explanation:

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4 years ago

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katovenus [111]

Answer: Darren

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4 years ago

A: 2, 3, 10, and 12 y: 2/3, 1, 10/3, and 4 Constant of proportionality: Equation: y =

stepladder [879]

Constant of proportionality : $\frac{1}{3}$

Equation: y = ka

How are the values calculated?

a: 2, 3, 10, and 12

y: 2/3, 1, 10/3, and 4

Let the constant of proportionality = k

If x and y are directly proportional ,

We know , k = $\frac{y}{x}$

Here, k = $\frac{y}{a}$

Considering y = 2/3 and a =2

k = $\frac{2}{3*2}$ = $\frac{2}{6}$ = $\frac{1}{3}$

Thus, the constant of proportionality ( k) = $\frac{1}{3}$

The equation y is given by ,

y = ka

Let us verify,

For k = 1/3 and a = 12

$y=\frac{1}{3} *12\\\\y=4$

Thus the equation is y = ka

What is constant of proportionality?

The constant value of the ratio between two proportional values is known as the constant of proportionality.

When the ratio or product of two changing quantities gives a constant, the two are said to be in a relation of proportionality.

The type of proportion between the two specified variables affects the constant of proportionality's value.

The formula y = kx can be used to determine the value of "k" in a direct proportionality.

Direct proportionality follows that k = y/x.

To learn more about constant of proportionality, refer:

brainly.com/question/28413384

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1 year ago

A sphere has a radius of 9 feet. A second sphere has a radius of 6 feet. What is the difference of the volumes of the spheres? T

Pani-rosa [81]

Answer:

684 π

Step-by-step explanation:

volume of a sphere = (4/3) x (n) x (r^3)

n = 22/7

r = radius

volume of larger sphere

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4/3 x n x 6³ =288n

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5 0

3 years ago