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Dvinal [7]
3 years ago
9

The diameter of a circle is 4 m. Find its area in terms of π

Mathematics
1 answer:
Firdavs [7]3 years ago
8 0

Answer:

should be 12.56

Step-by-step explanation:

the formula to find the area of a circle is A= πr2

so what you do is mulitply 3.14 ( number of pi) times radius  (half of what the diameter is) squared which is the radius times the radius

3.14 x 2 x 2 + 12.56

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Is 6 2/3 greater or less than 6 12/15
cricket20 [7]

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7 0
4 years ago
A city has a population of 310,000 people. Suppose that each year the population grows by 9%. What will the population be after
Leno4ka [110]

Answer: 644,800

Step-by-step explanation:

This can also be solved using the terms of Arithmetic Progressions.

Let the 13 years be number of terms of the sequences (n)

Therefore ;

T₁₃              = a + ( n - 1 )d , where a = 310,000 and d = 9% of 310,000

9% of 310,000 = 9/100 x 310,000

                        = 27,900

so the common difference (d)

                     d = 27,900

Now substitute for the values  in the formula above and calculate

T₁₃              = 310,000 + ( 13 - 1 ) x 27,900

                  = 310,000 + 12 x 27,900

                  = 310,000 + 334,800

                  = 644,800.

The population after 13 years = 644,800.

 

3 0
3 years ago
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