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3 years ago

Dmitri wants to cover the top and sides of this box with glass tiles that are 1 cm square.How many tiles will be need?

Mathematics

2 answers:

tatiyna3 years ago

7 0

Answer:

854 glass tiles

Step-by-step explanation:

first you have to find the area of each side so that you can add them up together.

(20*9)+(20*9)+(13*9)+(13*9)+(20*13)

Simplify

[(20*9)2] +[(13*9)2]+(20*13)

360+234+260

854

KengaRu [80]3 years ago

6 0

Answer:

372

Step-by-step explanation:

We are given that the dimensions of the box are,

Length = 15 cm, Width = 20 cm and Height = 9 cm.

We know that the box represents a cuboid.

Since, surface area of a cuboid = L×W + 2×L×H + 2×W×H

Thus, the surface area of the box = 15×20 + 2×15×9 + 2×20×9

i.e. Surface area = 300 + 270 + 360

i.e. Surface area = 930.

Thus, the surface area of the box is 930 cm² i.e. 9300 mm².

Further, the sides of the tiles are 5 mm and the tile represents a square.

So, the surface area of the tile = 5 × 5 = 25 mm².

This gives us that,

Number of tiles required to cover the box= 372.

Hence, Dmitri requires 372 tiles to cover the box

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horrorfan [7]

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Step-by-step explanation:

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AveGali [126]

Answer:

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Step-by-step explanation:

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3 years ago

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Goryan [66]

There are 8 points between 1 and 0 so divide 1 by 8.

1 / 8 = 0.125

Each point has a value of 0.125.

You can minus 0.125 from 1 until you reach A.

Or you can multiple 0.125 by the number of points from 0 to A, including A.

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4 years ago

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Determine if the graph is symmetric about the x-axis, the y-axis, or the origin.

Alexandra [31]

Answer: y-axis.

Explanation:

The equation r = 3 - 4 sin θ may be graphed using cartesian coordinates (i.e. x and y) or polar coordinates.

The logical way is to graph in polar coordinates. I did it using a graphing software and obtained the attached graph.

Also, I attached the graph in cartesian coordinates.

Here you have a table that you can build by your self and use the pairs to draw the graph (either cartesian or polar coordinates).

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7π/4 3.70710678 
15π/8 3.38268343 
2π 3 

In both of the attached graphs you can see that the left side is equal to the right side, but the upper side is not equal to the bottom side.

Therefore, the graph is symmetric about the y-axis.

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sasho [114]

Answer:

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Step-by-step explanation:

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