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ahrayia [7]
3 years ago
12

The answer to this question Volume =9,145.33 pi in^3 Diameter =38

Mathematics
1 answer:
katovenus [111]3 years ago
7 0

Answer: diameter=38\ in

Step-by-step explanation:

Based on the picture I assume that the exercise asks for the diameter of the sphere.

So, it is necessary to remember the following:

1.  the volume of a sphere can be calculated with the following formula:

V=\frac{4}{3}\pi r^3

Where "r" is the radius.

2. The radius is twice the diameter.

So, knowing that the volume of the sphere is:

V=9,145.33\pi\ in^3

You can substitute them into the equation and then solve for "r" in order to find its value:

9,145.33\pi\ in^3=\frac{4}{3}\pi r^3\\\\\frac{(3)(9,145.33\pi\ in^3)}{4\pi}=r^3\\\\\sqrt[3]{\frac{(3)(9,145.33\pi\ in^3)}{4\pi}}=r\\\\r=19\ in\\\\

Then, the diameter is:

d=2r\\\\d=2(19\ in)\\\\d=38\ in

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FinnZ [79.3K]

<u>Part 1: Finding radius</u>

The radius of a circle is defined as the distance from the center to a point on the circle's circumference.

Using the distance formula,

r=\sqrt{(-7-8)^{2}+(-1-7)^{2}}=\boxed{17}

<u>Part 2: Finding the point with x-coordinate -15</u>

Let the y coordinate of the point be y. Then, we have the point (-15, y). Substituting into the distance formula,

\sqrt{(-15-(-7))^{2}+(-1-y)^{2}}=17\\\\64+(-1-y)^{2}=289\\\\(-1-y)^{2}=225\\\\-1-y =\om 15\\\\y=\boxed{-16, 14}

4 0
2 years ago
Look at this triangle work out length BC
Andreas93 [3]

Answer:

The length of BC is √105 cm or 10.2 cm.

Step-by-step explanation:

You have to apply Pythagoras Theorem, c² = a² + b² where c represents hypotenuse, a and b are the sides :

{c}^{2}  =  { a}^{2}  +  {b}^{2}

let \:a =BC \:, \:  b = 8 \: , \: c = 13

{13}^{2}  =  {BC}^{2}  +  {8}^{2}

169 =  {BC}^{2}  + 64

{BC}^{2}  = 169 - 64

{BC}^{2}  = 105

BC =  \sqrt{105}

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3 years ago
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Please help explanation if possible
GREYUIT [131]

Answer:

x=-2 y=3

Step-by-step explanation:

you should multiple second equation by -5 and collect all terms then put -2 from x

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Surface Area of a Triangular Pyramid, please help!
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Answer:

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3 years ago
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Answer:

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Step-by-step explanation:

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