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2 years ago

The circumference of a circle is 19 pi meters. What is the radius in meters?

Mathematics

1 answer:

Murljashka [212]2 years ago

7 0

Answer:

Area = π·r^2 = 3.14·9.5^2 = 283.5 square meters(*)

Area of a circle in terms of diameter:

Area = π·(d/2)^2 = 3.14·(19/2)^2 = 3.14·(9.5)^2 = 283.5 square meters(*)

Area of a circle in terms of the circumference:

Area = C^2/4π = 59.69^2/4π = 3562.9/(4·3.14) = 3562.9/12.56 = 283.5 square meters(*)

(*) 283.52873698648 meters, exactly or limited to the precision of this calculator (13 decimal places).

Note: for simplicity, the operations above were rounded to 2 decimal places and π was rounded to 3.14.

Hope it is helpful...

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1 year ago

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3 years ago

PLEASE HELP

sweet [91]

Answer:

a) $2 + 3 + 5 + 6 = 16$

b) $8a + b-9$

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Step-by-step explanation:

We are given the following in the question:

1. Equivalent expression

$2 + 3 + 5 + 6$

Since all the terms are like terms, we can write,

$2 + 3 + 5 + 6 = 16$

2. Sum of given expression

$(8a - 2b - 4) \text{ and } (3b - 5)\\ (8a - 2b - 4) + (3b -5)\\= 8a -2b -4 + 3b -5\\\text{Collecting the like terms}\\8a + (-2b+3b) + (-4-5)\\= 8a + b-9$

3. Standard form of the expression

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which is the required standard form of the given expression.

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3 years ago