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PolarNik [594]
3 years ago
6

you plan to cover the entire surface area of a cylindrical dart board with cork. find the surface area of the dart board if the

radius is 7 inches and is is 3/4 inches thick.
Mathematics
1 answer:
Assoli18 [71]3 years ago
5 0
So the amount needed=area of circle times height
area formula=pi times radius^2
height=3/4

so
pi=aprox 3.14
radius=7
3.14 times 7^2
3.14 times 49
153.86
times 3/4
115.395 in^3

answer is 115.4 cubic inches


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Step-by-step explanation:

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2 years ago
A cylindrical tank with a radius of 12 inches and a height of 20 inches is full of water. Does the tank have enough water to fil
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Answer:

Yes, it can.

Step-by-step explanation:

To know if you can fill all the water balloons with the tank, the first thing is to calculate the volume of each one.

Volume of the tank, is a cylinder, whose volume is given as follows:

Vc = Pi * Rc ^ 2 * h

 

The radius of the cylinder has a value of 12 inches and the height of 20 inches. Thus:

Vc = 3.14 * (12) ^ 2 * 20 = 9043.2 inches ^ 3

Now, the volume of each globe that is a sphere is given by the following equation:

Ve = (4/3) * Pi * Re ^ 3

Being the radius of the sphere of 2, we have to:

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Now to know if you can fill all the balloons, we calculate the volume ratio of the tank and a balloon.

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Therefore, it can fill the 250 balloons because it has the capacity to carry approximately 269 balloons.

8 0
3 years ago
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This question needs more information to answer. Likewise if it was a riddle then the question might be a trick. If you have forgot to add any additional information I advise you to fix it right away then reupload the question.

Step-by-step explanation:

5 0
3 years ago
Please help with question. I’m stuck!
Arisa [49]
There would probably be multiple ways to solve this, but I will only show you one of them.
First, we need to figure out how many tablespoons of the chemical solution it takes to decrease the number of bacteria in a gallon to 300. So we subtract 1200 by 300, to find the number of unnecessary bacteria, which is 900. Now we divide 900 by 75, which is 12. So it would take 12 tablespoons of the chemical solution to make a gallon have 300 bacteria.
There are 500 gallons, and we need to put 12 tablespoons of the chem-solution in each gallon. So we multiply 500 by 12, which is 6,000. Meaning that 6,000 tablespoons of chemical solution would be needed to make the 500-gallon tank have 300 bacteria per gallon.
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