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Aliun [14]
2 years ago
12

Megan made a paper chain that was 4m long. Mason’s chain was 479 cm long. Who’s was the longest? By how much?

Mathematics
2 answers:
Mekhanik [1.2K]2 years ago
8 0

Answer:

Look below

Step-by-step explanation:

Let's start by converting 4 m into cm:

4m * \frac{10^{2}cm}{1m}= 4*10^{2}cm=400cm

Since Megan's chain is only 400 cm long, Mason's chain is longer by 79 cm.

Viktor [21]2 years ago
3 0

Answer:

Masons is longer

Step-by-step explanation:

4m=400 cm

479cm=4.79 m

I'm pretty sure you could answer the rest.

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The exact value of its surface area = 144π m²

The exact value of its volume = 288π m³

Step-by-step explanation:

∵ The diameter of the sphere is 12m

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∵ The volume of the sphere = 4/3 πr³

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3 years ago
Approximate <img src="https://tex.z-dn.net/?f=-8%20%2B%5Csqrt%7B20%7D" id="TexFormula1" title="-8 +\sqrt{20}" alt="-8 +\sqrt{20}
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The value of the radical expression -8 + √20 when expanded and solved is -3.6, based on the given parameters

<h3>What are equivalent expressions?</h3>

Equivalent expressions are different expressions that have equal values when evaluated and compared

<h3>How to approximate the radical expression?</h3>

The expression is given as:

-8 + √20

The above expression is a radical expression

So, we start by doing the following

Express 20 as 5 * 4

-8 + √20 = -8 + √(5 * 4)

Split the radical expression √(5 * 4)

-8 + √20 = -8 + √5 * √4

Evaluate the square root of 4 i.e. √4 = 2

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This gives

-8 + √20 = -8 + 2√5

Evaluate the square root of 5

-8 + √20 = -8 + 2 * 2.2

Evaluate the product of 2 and 2.2

-8 + √20 = -8 + 4.4

Evaluate the difference

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Based on the given parameters, the value of the radical expression -8 + √20 when expanded and solved is -3.6

So, the complete equation is:

-8 + √20 = -3.6

Read more about equations at:

brainly.com/question/2972832

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