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Shtirlitz [24]
3 years ago
13

A circle has a circumference of 16π. What is the radius of the circle?

Mathematics
2 answers:
oksian1 [2.3K]3 years ago
7 0
Radius = Circumference / 2π
r = 16π/2π
r = 8

In short, Your Answer would be 8

Hope this helps!
VashaNatasha [74]3 years ago
5 0

Answer:

8 units.

Step-by-step explanation:

As the given data is the circumference, we are going to use the circumference formula to find the radius.

C=2\pi r

where C is the circumference and r is the radius, then

16\pi=2\pi r

\frac{16\pi}{2\pi} = r

8 = r

Then, the radius of the circle is 8 units.

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Choose the best estimate for the mass of a raisin.
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A) 0.2g

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harina [27]
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What is the following product ?
AfilCa [17]

Answer:

The correct answer is option B). 7x² -12x√14 + 72

Step-by-step explanation:

I<u>dentity</u>

(a - b)² = a² - 2ab + b²

Find the product

It is given that ( x√7 - 3√8)(x√7 - 3√8)

(x√7 - 3√8)(x√7 - 3√8) =  (x√7 - 3√8)²

(x√7 - 3√8)² =  (x√7)² - 2*x√7*3√8 +(3√8)²

 = 7x² - 6x√56 + 72

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Therefore the correct answer is option B).  7x² - 12x√14 + 72

8 0
3 years ago
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Determining the input using an equation f (x) = -1/3x + 7
daser333 [38]

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19

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2/3-7=-1/3x

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4 0
3 years ago
The volume of a hemisphere is 144 pi. Find the radius and total surface area.
sineoko [7]
Formula of the Volume of a hemisphere:
V = \frac{2}{3}\pir³
144\pi = \frac{2}{3}\pir³
Multiply by 3 to cancel fraction in the right side
144\pi × 3 = 2\pi r³
432 \pi = 2\pir³
Divide by 2\pi on either sides to isolate r³
\frac{432 \pi }{2 \pi } = \frac{2 \pi }{2 \pi }r³
2\pi and 2 \pi cancel out
216 = r³
Take cube root to find the radius
\sqrt[3]{216} = \sqrt[3]{r^3}
6 = r
Radius is 6 units

The formula of the surface area of a hemisphere is:
S.A = 2\pir² + \pir²
       = 2\pi(6)² + \pi(6)²
       =2\pi × 36 + 36\pi
       = 72\pi + 36\pi
       = 108\pi units²  (in terms of \pi)
       ≈ 339.12 units²

Surface area = 108\pi units
8 0
3 years ago
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