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NikAS [45]
3 years ago
9

Algebra pls help, will mark brainlest

Mathematics
1 answer:
leonid [27]3 years ago
7 0
1.67 2B 3A just did on edg 2020
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VashaNatasha [74]
I read it pls mark Brainlyist
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3 years ago
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What is the volume of a hemisphere with a diameter of 51.8 inches rounded to the nearest 10th of a cubic inch?
lorasvet [3.4K]

Answer:

volume of a hemisphere ≈ 36369.5 in³

Step-by-step explanation:

To find the formula for calculating the volume of a hemisphere, we will follow the steps below:

write the formula for calculating the volume of a hemisphere.

volume of a hemisphere = volume of a sphere ÷2

                                        = \frac{4}{3}πr³   ÷   2

                                        =\frac{2}{3} πr³

where r is the radius

from the question given, diameter = 51.8 inches

but diameter = 2r , this implies that r = \frac{d}{2}    hence   r = \frac{51.8}{2} = 25.9 inches

π is a constant and is ≈ 3.14

we can now proceed to insert the values into the formula

volume of a hemisphere    =\frac{2}{3} πr³

                                                =\frac{2}{3} × 3.14 ×25.9³

                                                =\frac{2}{3} × 3.14×17373.979

                                                 ≈36369.5 in³ to the nearest tenth cubic inch.

volume of a hemisphere ≈ 36369.5 in³

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4 years ago
A farmer's land is separated into sections of size
Evgen [1.6K]
I think it's 9.68 but I might be wrong
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Cot^4θ-4cot^2θ-5=0 <br>solve for θ
stich3 [128]
\cot^4\theta-4\cot^2\theta-5=(\cot^2\theta-5)(\cot^2\theta+1)=0

\cot^2\theta-5=0\implies\cot^2\theta=5\implies\cot\theta=\pm\sqrt5

Recall that \cot\theta=\cot(\theta+\pi), which is to say \cot x has period \pi. This in turn means that \cot\theta=0 will have the same solutions as \cot(\theta+n\pi)=0 for any integer n. So the general solution to the first case is

\cot\theta=\pm\sqrt5\implies\theta=\cot^{-1}(\pm\sqrt5)+n\pi

where n is any integer.

On the other hand,

\cot^2\theta+1=0\implies\cot^2\theta=-1

but x^2\ge0 for any value of x, so this equation has no (real) solutions for \theta.
4 0
3 years ago
Aubrey wants to buy a pair of jeans of $29.99 and a shirt for $15.75. How much money does Aubrey need to buy both items?
aniked [119]

Answer:

$55-$60

Step-by-step explanation:

3 0
3 years ago
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