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bearhunter [10]
3 years ago
5

What is the circumstance of a circle using 3 for pi and the radius is 7

Mathematics
1 answer:
Alisiya [41]3 years ago
6 0
It is 43.96 because radius times 2 is diameter, so 7 times 2 is 14. 14 times pi or 3.14 is 43.96.
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John has a cylindrical propane tank that measures 8" in diameter and 8" tall If John
kirza4 [7]

Answer:

2 times as large

Step-by-step explanation:

For the original cylinder, we can say that the volume of a cylinder is equal to V= πr²h. For this cylinder, we can say that  V = π * radius² * height. The radius is equal to 1/2 of the diameter, so the original radius is 8/2 = 4. Therefore, the volume of the original cylinder is V = π * radius² * height = π * 4² * 8 = π * 16 * 8 = π * 128

For the new cylinder, "twice as wide" means that the diameter is twice as big as the original one. Half the height means that the height is halved. The new diameter is therefore 8 * 2 = 16 (meaning that the new radius is 16/2=8) while the new height is 8/2 = 4. The new volume is thus

V = π * radius² * height = π * 8² * 4 = π * 64 * 4 = π * 256

To see how much larger the new tank volume is, we can divide (new tank volume) by (old tank volume), resulting in

π * 256 / (π *128) = 2

8 0
3 years ago
Substitute the given values into the formula and solve for the unknown variable. If necessary, round to one decimal place
Stells [14]

Answer:

4=H

Step-by-step explanation:

H is unknown

180=4x7x5+2x5xH

180=140+10H

40=10H

4=H

7 0
3 years ago
The histograms below show the heights (in meters) of the tallest buildings in China and the United States.
gregori [183]

Answer:

A and B

Step-by-step explanation:

This is correct on khan academy!

8 0
3 years ago
Read 2 more answers
Which is the best strategy to use to solve this problem?
nlexa [21]
C. you need to find the area and perimeter to find the outside

6 0
3 years ago
Read 2 more answers
*High School problem not Middle School
devlian [24]
Should be c ? can you send me a picture please ? and it’s dice .
4 0
3 years ago
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