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2 years ago

5

Priya measured the perimeter of a square desk rounded to the nearest cm and found 248 cm. Noah measured the perimeter of the sam

e desk to the nearest mm and found 2468 mm.
By how many millimeters do these measurements differ?

1 answer:

rodikova [14]2 years ago

3 0

Answer:

12mm

Step-by-step explanation:

We have to convert cm to mm. We then subtract 2480 - 2468, thus getting 12.

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2 years ago

A researcher surveyed 220 residents of a city about the number of hours they

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Margin of error of 0.0485 hours.

Step-by-step explanation:

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In this question:

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2 years ago

Identify BR rounded to the nearest tenth. HELP PLEASE!!

ahrayia [7]

Answer:

<h2>BR ≈ 49.0</h2>

Step-by-step explanation:

Use cosine:

$cosine=\dfrac{adjacent}{hypotenuse}$

We have

$adjacent=42\\hypotenuse=BR\\\alpha=31^o$

$\cos31^o\approx0.8572$

Substitute:

$\dfrac{42}{BR}=0.8572$

$\dfrac{42}{BR}=\dfrac{8,572}{10,000}$ <em>cross multiply</em>

$8,572BR=420,000$ <em>divide both sides by 8,572</em>

$BR=\dfrac{420,000}{8,572}$

$BR\approx49.0$

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2 years ago