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MakcuM [25]
3 years ago
12

The circumference of a circle is 81.64 km what is the circles radius? use 3.14 for pi

Mathematics
2 answers:
natima [27]3 years ago
7 0

Answer:

12.99km

Step-by-step explanation:

Using the formula

C=2(pi)(r)

aleksandr82 [10.1K]3 years ago
3 0

Answer:

13km

Step-by-step explanation:

We can use the formula [ r = C/2π ] to solve.

r = 81.64/2(3.14)

r = 81.64/6.28

r = 13km

Best of Luck!

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The number of tiles needed to cover the surface area of the box excluding the bottom is: 1,046 tiles.

<h3>What is the Surface Area of a Box?</h3>

The surface area of a box is the area surrounding all its faces. A box has 6 rectangular faces. Therefore, the total surface area of the box equals the sum of all 6 rectangular faces.

<h3>What is the Surface Area of a Box?</h3>

SA = 2(lw + lh + hw), where:

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  • w = width
  • h = height of the box

The image attached below shows the box Dmitri wants to cover. Since the bottom of the box would be excluded, therefore:

The surface area to be covered = surface area of the box - area of the bottom rectangular face

The surface area to be covered = 2(lw + lh + hw) - (l)(w)

l = 26

w = 15

h = 8

Substitute

The surface area to be covered = 2(l×w + lh + hw) - (l)(w) = 2·(15·26+8·26+8·15) - (26)(15) =

The surface area to be covered = 1436 - 390 = 1,046 cm

Area of one tile = 1 cm square

Number of tiles needed = 1,046/1

Number of tiles needed = 1,046 tiles.

Learn more about Surface Area of a Box on:

brainly.com/question/26161002

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2 years ago
Two number cubes are rolled and the results are added. What is the probability that the sum is equal to 2?
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Answer:

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Step-by-step explanation:

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