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3 years ago

What is the circumference of a circle with a radius of 7 feet? 42 3.5 28 14

Mathematics

1 answer:

lubasha [3.4K]3 years ago

8 0

Answer:

44 feet

Step-by-step explanation:

$C = 2\pi \: r= 2 \times \frac{22}{7} \times 7 \\ = 2 \times 22 \\ = 44 \: feet$

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4 years ago

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The weight W that a horizontal beam can support varies inversely as the length L of the beam. Suppose that an 8 dash m beam can

miss Akunina [59]

<h2>Answer:</h2>

The number of kilograms a 19 m beam can support is:

378.9474 kg

<h2>Step-by-step explanation:</h2>

It is given that:

The weight W that a horizontal beam can support varies inversely as the length L of the beam.

Let k denote the constant.

This means that the weight W and Length L is related as:

$W=\dfrac{k}{L}$

Suppose that an 8 dash m beam can support 900 kg.

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$900=\dfrac{k}{8}\\\\i.e.\\\\k=900\times 8\\\\i.e.\\\\k=7200$

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$W=\dfrac{7200}{19}\\\\i.e.\\\\W=378.9474\ kg$

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