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oee [108]
3 years ago
10

Hans is going to set bricks in sand to make a circular base for a screen house. The diameter of the base will be 14 feet. He enc

lose the circular area with a plastic edging before he puts In a layer of sand. How much plastic edging does he need ?
Mathematics
1 answer:
Blizzard [7]3 years ago
5 0

He wants  44 feet plastic edging.

Explanation

Hand is setting up a circular  base for a screen house and the dimensions of the circular base is given. we have to find out the length of plastic edging that encloses the base.The length of the edging will be the circumference of the circular base.

diameter of the base=14 feet

radius of the base=diameter/2=14/7=7 feet

circumference=2\pi r\\=2*3.14*7=44 feet

The length of the plastic edging is 44 feet.

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A boy yells in a narrow valley. the sound reflects off of a boulder that is 80 m away. how long will it take to hear the echo if
Angelina_Jolie [31]

Answer:

  0.50 seconds

Step-by-step explanation:

The time it takes for an echo to return is the time it takes for the sound to make the round trip between the source and the reflecting object.

The boulder is 80 m away from the source, so the round-trip distance is 2×80 m = 160 m. At a speed of 320 m/s, it takes sound ...

  (160 m)/(320 m/s) = 0.50 s

to make the round-trip.

It will take 0.50 seconds to hear the echo.

3 0
3 years ago
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a number set consists of {4,5,6,7}。How many 2-digit combinations of numbers from the data set can be divided by 3?
kifflom [539]

Answer:

5

Step-by-step explanation:

This trick works with 3:

If the sum of the digits of a number is divisble by 3 then the number is divisble by 3.

44 is not divisble by 3 because 4+4=8 is not divisble by 3.

45 is divisble by 3 because 4+5=9 is divisble by 3.

46 is not divisble by 3 because 4+6=10 is not divisble by 3.

47 is not divisble by 3 because 4+7=11 is not divisble by 3.

54 is divisble by 3 because 5+4=9 is divisble by 3.

55 is not divisble by 3 because 5+5=10 is not divisble by 3.

56 is not divisble by 3 because 5+6=11 is not divisble by 3.

57 is divisble by 3 because 5+7=12 is divisble by 3.

64, 65,67 are not divisble by 3 because their digits' sums are 10,11, and 13 respectively. 66 is a winner because 6+6=12 is divisble by 3.

Finally 7...

74,76,77 are not divisble by 3 because their digits' sums are 11,13, and 14 respectively. 75 is divisble by 3 because 7+5=12 is divisble by 3.

The victors are

45

54

57

66

75

4 0
3 years ago
Solve pls <br> 2x - 5 = 7
storchak [24]

Answer:

<h2>x = 6</h2>

Step-by-step explanation:

2x - 5 = 7 \\ 2x = 12 \\ x = 6

4 0
3 years ago
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Diano4ka-milaya [45]

Answer: simplest reason is that Infinity is not a number, it is an idea.

So 1∞ is a bit like saying 1beauty or 1tall.

Maybe we could say that 1∞= 0, ... but that is a problem too, because if we divide 1 into infinite pieces and they end up 0 each, what happened to the 1?

In fact 1∞ is known to be undefined.

But We Can Approach It!

So instead of trying to work it out for infinity (because we can't get a sensible answer), let's try larger and larger values of x:

graph 1/x

x 1x

1 1.00000

2 0.50000

4 0.25000

10 0.10000

100 0.01000

1,000 0.00100

10,000 0.00010

Now we can see that as x gets larger, 1x tends towards 0

We are now faced with an interesting situation:

Step-by-step explanation:

8 0
3 years ago
Good review if you answer with the right answer
SashulF [63]

Answer:

top left choice

Step-by-step explanation:

the slope is negative, so its flipped

the y int is -6, below the x axis

4 0
3 years ago
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