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NeX [460]
3 years ago
6

Can somebody please help me

Mathematics
1 answer:
UNO [17]3 years ago
7 0
<h3>Exact area = 25pi</h3><h3>Approximate area = 78.5</h3>

You can pick one or the other to have as your answer

===========================

Explanation:

The formula you use is

A = pi*r^2

The radius is r = d/2 = 10/2 = 5

So,

A = pi*r^2 = pi*5^2 = pi*25 = 25pi

is the exact area

Replace pi with 3.14 to get 25*pi = 25*3.14 = 78.5

which is the approximate area

To get a better approximation, you would use more decimal digits of pi.

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Fofino [41]

Answer:

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Step-by-step explanation:

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Hat is the surface area of a sphere with a diameter of 16 cm
alexgriva [62]
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How do you write 11/25 as a percentage?
Mandarinka [93]

Answer:

44%

Step-by-step explanation:

11/25 =0.44

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6 0
2 years ago
Read 2 more answers
A triangle has sides which are consecutive odd integers and an
wolverine [178]

Answer:

Perimeter = 15

Step-by-step explanation:

We are told that the length of each of the 3 sides of the triangle are consecutive odd integers.

Thus means that we can write the 3 terms as;

(x - 2), x, (x + 2)

Thus, perimeter is;

P = (x - 2) + x + (x + 2)

P = 3x

If an angle is 120°, it means that the corresponding side that is directly opposite the angle is the largest side of the triangle.

Thus, this side is (x + 2)

Using cosine rule, we have;

(x + 2)² = x² + (x - 2)² - 2(x(x - 2))cos 120

Expanding, we have;

x² + 4x + 4 = x² + x² - 4x + 4 - (2x² + 4x)(-½)

This reduces to;

4x = x² - 4x + x² - 2x

2x² = 10x

2x = 10

x = 10/2

x = 5

Thus, other sides are;

(x - 2) = 5 - 2 = 3

And (x + 2) = 5 + 2 = 7

So,perimeter is;

P = 3x = 3 × 5 = 15

8 0
3 years ago
the ratio of lions supporters to sharks supporters in a sports bar is 2:5. If there are 35 people in the bar how many are sharks
Rudik [331]

Answer:

10

Step-by-step explanation:

2+5 = 7

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hope this helps...

3 0
3 years ago
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