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3 years ago

9

What is the best approximation for the area of a circle with a diameter of 19 meters?

2 answers:

FromTheMoon [43]3 years ago

8 0

$A = \pi r^{2}$ is the equation used for determining area from radius. We're given diameter, so to get the radius simply divide by 2. 19/2 = 9.5.

$A = (3.14)(9.5)^{2}$ , when solved, equals $283.385 m^(2)$ . After rounding to the nearest tenth, we get $283.4 m^{2}$

Paladinen [302]3 years ago

6 0

Answer:

283.4m2 short answer ;)

Step-by-step explanation:

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3 years ago

PLEASE HELP The areas of two similar triangles are 50 dm2, and 32 dm2. The sum of their perimeters is 117 dm. What is the perime

Novosadov [1.4K]

Answer:

65 dm and 52 dm

Step-by-step explanation:

If the scale factor of the sides is k, then the scale factor of the areas is k^2.

The scale factor of the areas is (32 dm^2)/(50 dm^2) = 0.64 = k^2

The scale factor of the sides is k = \sqrt(0.64) = 0.8

The perimeters are in a ratio of 1:0.8

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4 0

3 years ago

A number is written with the following factorization:2² x 3 x 5⁴ x 8 x 11².Is this factorization a prime factorization? Explain

BigorU [14]

Answer:

NO, this is not prime factorization.

The correct prime factorization is = $2^{5} X 3 X 5^{4} X 11^{2}$

Step-by-step explanation:

Prime factorization means, writing the given number as product of prime numbers.

In the above case, in the prime factorization,<em> the number 8 is present which is not a prime number.</em>

8 can be further represented as product of prime numbers as,

$8 = 2^{3}$

Now the prime factorization reduces to,

= $2^{2} X 3 X 5^{4} X 2^{3} X 11^{2}$

= $2^{5} X 3 X 5^{4} X 11^{2}$

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3 years ago