3 years ago

Is the square root of 21 is an irratoinal number true or false explain

Mathematics

1 answer:

MrRa [10]3 years ago

3 0

Yes it is because it has no square factors.

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AEFG - ALMN. Find LM.

ollegr [7]

Answer:

The solution is 2.5. The problem can be solved using the proportion:

Step-by-step explanation:

I hope it makes since =)

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3 years ago

If a tree 28 meters tall casts a shadow 32 meters long, what is the angle of elevation of the sun to the nearest degree?

blagie [28]

We need an angle measure we have to use an inverse trig ratio, sin^-1, cos^-1, or tan^-1.
Setting up the right triangle we have the opposite and adjacent so we use tan.
tan angle = 28/32
tan^-1 (28/32) = 41 degrees

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Answer:

Step-by-step explanation:

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BartSMP [9]

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1) C

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Step-by-step explanation:

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2 years ago

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Two garden plots are to have the same area. One is square and one is rectangular. The rectangular plot is 2 meters wide and 8 me

Crank

First, let's look at the formulas for the area of square and area of the rectangle.

$A_{square}=a^2$

$A_{rectangle}=a\cdot b$

And what this exercise states is that the areas are the same. So:

$A_{square}=A_{rectangle}\Longrightarrow a^2=a\cdot b$

Now put in the data.

$a^2=2\cdot8$

Solve for $a$ :

$a=\sqrt{2\cdot8}=\sqrt{16}=\boxed{4}$

The side of the square garden plot is 4 meters.

Hope this helps.

r3t40

7 0

3 years ago