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3 years ago

N^3 is three times the square root of 81. What number is n?

Mathematics

1 answer:

Elena L [17]3 years ago

7 0

The answer is 27. The square root of 81 is 9 and 9 x 3 is equal to 27.

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Find the value of x. 4^3 = x

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What is the surface area of this triangular prism rounded to the nearest tenth? A) 48.6km2 B) 63.4 km2 C) 72.6 km2 D) 84.4 km2

Mekhanik [1.2K]

Correct option B) $63.4km^2$ .

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

We have the following figure attached as shown below.

Now, this triangular prism have 2 similar right angled surfaces and 3 rectangular surfaces , Let's calculate area for all of them:

2 similar right angled surfaces

We know that area of triangle = $\frac{1}{2} b(h)$

⇒ $area = \frac{1}{2} b(h)$

⇒ $area = \frac{1}{2} (3.6)(7.7)$

⇒ $area = 13.86km^{2}$

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3 rectangular surfaces

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⇒ $area_2= 7.7(1.8)$

⇒ $area_2 = 13.86km^2$

⇒ $area_3 = 8.5(1.8)$

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Correct option B) $63.4km^2$ .

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Vera_Pavlovna [14]

Answer:

Step-by-step explanation:

4+6 does not equal 12 so there for it is incorrect

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