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3 years ago

A solid plastic ball is a sphere with a radius of 8 inches. How much plastic does it take to make one ball

Mathematics

1 answer:

mihalych1998 [28]3 years ago

7 0

Answer:

2144.66in³

Step-by-step explanation:

Radius = 8 inches.

To determine the amount of sphere to make the ball, we'll have to find its volume.

Volume of a sphere = 4/3 * Πr³

V = 4/3*Πr³

Π = 22/7

V = 4/3 * 22/7 * 8³

V = 2144.66inches³

V = 2144.66in³

The amount of plastic required is 2144.66in³.

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Answer:

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Step-by-step explanation:

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2 years ago

Which expression is equivalent to 8a + 20?

Darina [25.2K]

To determine the expression that is equivalent to 8a + 20, all you have to do is find the common denominator and divide the values by it.

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The correct solution would cue the second option - 4(2a + 5).

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3 years ago

Read 2 more answers

NO COPYING

worty [1.4K]

So its going to equal a fraction.

To convert let x equal the repeating decimal (0.1515... it would usually have a line on top of it but I cant type it)

Then examine the number see what place it is in then add another place (in this case it is in the 10000ths place) so multiply it but 10000x

so it would look like: 10000x = 0.1515

then you will move the decimal in to a whole numbers place (0.1515 to 1515.1515

then subtract the decimal 1515.1515- .1515= 1515.

dont forget to subtract from both sides so subtract the 10000x too. (999.515)

then write as fraction form 1515/9999

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3 years ago

Please help it’s for a unit test!

notka56 [123]

Answer:

X=___ or x=8 or one of my other answers in the explanation! I hope this helped!

Step-by-step explanation:

it must be 4 because 4 goes on the side by +4 and its x+4 then the other side of the shape is 8 so that meaning x is 4 then 2x+1 is 2 times X + 1 so 2 times 4... 2,4,6,8 or 4+4=8 so then 2 times + 1 is 8 + 1 so 8+1=9 so 2x+1 might also be 12 because its on the other side of the problem/ shape so you use all that you have so you could maybe plus the other side not the problem side for making it a and c and stuff but also 8+12 so 8+12=20 then x might be 20 but you answer meaning X is 8. X=8 Brainliest? i tried really hard! I am not even near this grade whatever grade this is... Plz! Thanks! Thank you! Have a great day or week or weekend! i answer a lot of questions and help 114 people or something or more! Plz put 5 stars, a heart, and brainliest i would really appreciate that thank you! Enjoy the rest or your day! Bye! <3 :)

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3 years ago

What is the solution to the system of equations?

Dovator [93]

Answer:

Step-by-step explanation:

$\left\{\begin{array}{ccc}x+3y+2z=8&(1)\\3x+y+3z=-10&(2)\\-2x-2y-z=10&(3)\end{array}\right\qquad\text{subtract both sides of the equations (1) from (2)}\\\\\underline{-\left\{\begin{array}{ccc}3x+y+3z=-10\\x+3y+2z=8\end{array}\right }\\.\qquad2x-2y+z=-18\qquad(4)\qquad\text{add both sides of the equations (3) and (4)}\\\\\underline{+\left\{\begin{array}{ccc}-2x-2y-z=10\\2x-2y+z=-18\end{array}\right}\\.\qquad-4y=-8\qquad\text{divide both sides by (-4)}\\.\qquad\qquad y=2\qquad\text{put the value of y to (1) and (3)}$

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$x+2(6)=2\\x+12=2\qquad\text{subtract 10 from both sides}\\x=-10$

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3 years ago