Is the area of a key on a calculator 6.5 mm^2 , 65 mm^2 or 0.65 cm^2?

Mathematics

1 answer:

Lubov Fominskaja [6]3 years ago

3 0

Answer:

65 $mm^2$ or 0.65 $cm^2$ which are exactly the same area

Step-by-step explanation:

Notice that 65 $mm^2$ is exactly the same as 0.65 $cm^2$ .

The most likely answer is 65 $mm^2$ , since 8 mm by 8 mm is a reasonable size for a square shaped key of a hand-held calculator to fit a human finger.

The answer 6.5 $mm^2$ is an area too small (about a square 3 mm by 3 mm which is to small for a human finger. It would be more appropriate for a pen or point of some type.

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The equation for volume is l × w × h where l is the length, w is the width, and h is the height.

So, the volume of the shoebox is

V = l × w × h
V = 12 × 6 × 4
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To find the volume of the crate, we simply multiply the volume of one shoebox by 20, as the crate holds 20 shoeboxes.

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10a. Each shoebox has a volume of 22 cubic inches. False. The volume is 228 cubic inches.

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11 part A:

Each term above describes the term below, but the term below doesn't necessarily describe the term above.

The choice of terms is : trapezoid, triangle, rhombus, parallelogram

Before we do anything else, let's define our terms, as well as the ones used in the diagram.

Trapezoid - A four sided shape with a pair opposite parallel sides.
Triangle - A shape with three sides.
Rhombus - A shape with four equal straight sides.
Parallelogram - A quadrilateral with two sets of parallel sides.
Quadrilateral - A four-sided shape with four angles.
Square - A four-sided shape with all four sides the same length, and all four angles are the same size.

The first term is quadrilateral. From this, we can determine that the term triangle won't be used at all, as it's a three-sided figure, whereas a quadrilateral is a four-sided figure. This leaves trapezoid, rhombus, and parallelogram as our terms.

A trapezoid is a quadrilateral, because it has four sides, but it can't be a rhombus or parallelogram, so it goes in the first open box.

A parallelogram is a trapezoid, because it has a pair of opposite parallel sides, but it can't be a rhombus, because it doesn't necessarily have all equal sides, so it goes in the second open box.

A rhombus is a parallelogram, because it has two sets of parallel sides, and goes in the third open box.

So, from top box to bottom box, the order the term go is
Quadrilateral
Trapezoid
Parallelogram
Rhombus
Square

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