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3 years ago

What is the exact volume of the cone? (height is 9 cm, the radius is 15 cm)

Mathematics

2 answers:

Ugo [173]3 years ago

8 0

D is the answerr to the first one.

Illusion [34]3 years ago

6 0

1: Exact volume of cone = r^2 * h/ 3 = 15^2 * 9 / 3 = 225 * 9= 2025/3 = 675

2: Approximate volume of cone: pi* r^2 * h / 3 = 3.14 * 10^2 * 9/3 = 3.14 * 100* 9/3 = 3.14 x 900 / 3 = 2826/3 = 942 cm^3

3: Asks for the same as problem above, but we have to divide the diameter by 2 to get the radius first 10/2=5 now we can solve. : 3.14 * 5^2 * 5/3 = 3.14 * 25 * 5/ 3 = 3.14 * 125 / 3 = 392.5/ 3 = 130.8 m^3

The exact volume does not use pi: so that is why the first one is 675
The Approximate used pi or 3.14.

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vova2212 [387]

Answer:

$cos \theta = -\frac{8}{17}$

Step-by-step explanation:

For this case we know that:

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And if we replace the value given we got:

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$cos \theta = -\frac{8}{17}$

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2 years ago

Roberto is cutting 3 loaves of homemade bread into halves to give to his neighbors. How many neighbors can he give ½ loaf of bre

statuscvo [17]

Answer:

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cluponka [151]

Answer:

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2 years ago

The perimeter of a rectangle is 158 cm. If the length is 7 more than 3 times the width:

Goryan [66]

Width of rectangle = x
Length =3x+7
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8x=158-14
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2 years ago