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3 years ago

Identify the volume and surface area in terms of π of a sphere with a great circle area of 225π ft2

Mathematics

2 answers:

Dafna1 [17]3 years ago

7 0

The answer is going to be v= 4500ft3;S=900ft2

adelina 88 [10]3 years ago

7 0

Answer:

B (V = 4500π ft3; S = 900π ft2)

Step-by-step explanation:

If the great circle's area is 225pi, that makes the radius sqrt225 = 15

The volume of a sphere is (4/3) pi r^3, so the volume would be 3375 * 4/3 pi= 4500pi

The surface area of a sphere is 4 pi r^2, so the Surface area would be 4 * 225 pi = 900pi

That makes the answer B (V = 4500π ft3; S = 900π ft2)

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3 years ago

Pls help 5[9+3(3.2-3)]

SIZIF [17.4K]

Answer:

Step-by-step explanation:

3.2 - 3 = .2

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3 years ago

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3 years ago

1) Omar has scored 85, 71, and 77 on the first three exams in his math class. If the standard 70,80,90 scale is used for grades

Rus_ich [418]

Answer:

a. 47

b. 87

c. 127

Step-by-step explanation:

Assume a total of 4 exams ( first 3 plus a final)

Let final score be X,

Hence, average score = (85 + 71 + 77 + x) / 4 = (233 + x) / 4

a) to get a C, the average score must be 70

70 = (233 + x) / 4

(233 + x) = 70 (4) = 280

x = 280 - 233 = 47 (Ans)

b) to get a B, the average score must be 80

80 = (233 + x) / 4

(233 + x) = 80 (4) = 320

x = 320 - 233 = 87 (Ans)

c) to get a A, the average score must be 90

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2 years ago

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Anton [14]

the answer to this question is

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7 0

3 years ago