What Is The Answer? I also don't Understand this

Mathematics

1 answer:

Elodia [21]3 years ago

4 0

We need to simplify this number. We begin by evaluating the numbers inside the equation. We can simplify this to:

$(2 \sqrt{k})^{-2}$

Now, we evaluate this one step further. Because a negative exponent makes the number 1 over what it was, we can make this problem:

$\frac{1}{(2 \sqrt{k})^{2} }$

This becomes:

$\frac{1}{(2 \sqrt{k})(2 \sqrt{k} ) } --\ \textgreater \ \frac{1}{4k}$

So, 1/4k is the answer. This is the same as C, so C is the right answer.

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The base of a cube is parallel to the horizon. If the cube is cut by a plane to form a cross section, under what circumstance wo

Keith_Richards [23]

This question has this set of answer choices:

a) when the plane cuts three faces of the cube, separating one corner from the others

b) when the plane passes through a pair of vertices that do not share a common face

c) when the plane is perpendicular to the base and intersects two adjacent vertical faces

d) when the plane makes an acute angle to the base and intersects three vertical faces

e) not enough information to answer the question

The right answer is the first choice: a) when the plane cuts three faces of the cube, separating one corner from the others

You can see a picture of this case in the figure attached: as you can see the cross section (in pink) is a triangle.