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schepotkina [342]
3 years ago
5

Radius of a circular ground is 21m. Find.

Mathematics
1 answer:
trapecia [35]3 years ago
6 0

The circumference of a circle of radius r is

C=2\pi r

So, in your case, the circumference is

C=2\cdot \pi \cdot 21 = 42\pi

The circumference is actually the length of the "perimeter", so the answer to questions 1 and 2 looks the same actually

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Can you help me with perpendicular lines and parallel lines?
lawyer [7]

Answer:

1a. Parallel

1b. Parallel

1c. Perpendicular

Step-by-step explanation:

Parallel lines never intersect. This means they have the same slope. Their equations will have the same value for slope in y=mx+b.

Perpendicular lines intersect at 90 degrees. Their slopes are negative reciprocals of each other. If the slope in y=2x+1 is m=2. Then the perpendicular line will be -1/2.

To determine if the lines are perpendicular or parallel, convert each equation to y=mx+b form.

1a. y=5/2 x -3

5x=2y - 4 becomes y=5/2x +2                       Parallel

1b. 2x+8y=-24 becomes y=-1/4 x-3

48y=-12x-144 becomes y= -1/4 x-3                  Parallel

1c. 2x-7y=-56 becomes y=2/7 x + 8

7x+2y=8 becomes y= -7/2 x + 4                     Perpendicular


3 0
4 years ago
Match each equation to its solution.
motikmotik
Ik one of them.. x = 6 to 000
5 0
4 years ago
Read 2 more answers
Aria is trying to build up her savings. Which are the three most helpful questions she should ask herself before making a purcha
4vir4ik [10]

Answer:

Do I really need it?

Can I find it for a cheaper price?

Can I replace it with something else that I already have or that has a lower price?

Step-by-step explanation:

When you are trying to build up your savings you need to to spent money only on the necessary things to be able to save more money every time you get paid. So, according to this, the three questions that Aria should ask herself before making a purchase are:

-Do I really need it? To make sure that it is something that you really require and not something that you just want to buy but it is not going to cover a need.

-Can I find it for a cheaper price? Maybe you can buy it in another place where the product has a lower price or you can get a cheaper brand.

-Can I replace it with something else that I already have or that has a lower price? Maybe you already have a product that does the same thing or you can buy one that replaces the function this one does and that is cheaper.

7 0
3 years ago
You are printing out information packets for your company. You will need a total of 6,400 pages to complete all of the packets.
Vera_Pavlovna [14]

Answer:

<h3>13 reams</h3>

Step-by-step explanation

Given

Total number of pages to complete the packet = 6400 pages

If each ream contains 500pages, then:

Total number of reams needed = Total pages/number of pages per ream

Total number of reams needed = 6400/500

Total number of reams needed = 12.8

<em>Hence you will need about 13 reams for all the packets</em>

3 0
3 years ago
Hii help me pls this math test is so hard
DanielleElmas [232]
The last 2 options I belive
8 0
3 years ago
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