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scoray [572]
3 years ago
8

Please help i have no clue how to do this. any tips please and thank you :)

Mathematics
1 answer:
horsena [70]3 years ago
3 0
circumference= 2(pi)r OR (pi)d
d is diameter and r is radius

if the circumference is given, then you would have to work backwards.

in this case, Circumference = 78.5 ft

the equal you would use for the radius would be 78.5 = 2 x 3.14(pi) x r
- multiply 2 x 3.14 and get 6.28
- divide 6.28 on both sides to get ‘r’ by itself
- 12.5 = r

next, for the diameter you can use C= (pi) x d
- 78.5 = 3.14 x D
- divide 3.14 on both sides to get ‘d’ by itself
- 25 = d

hope this helps! make brainliest please
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A population of flies grows according to the function p(x) = 3(2)x, where x is measured in weeks. A local spider has set up shop
kifflom [539]
The answer is 14 flies 

1. Calculate the population of flies after 3 weeks without the spider: p(3)
2. Calculate the number of eaten flies by the spider after 3 weeks: s(3)
3. Subtract p(3) and s(3) to get  the population of flies after three weeks with the introduced spider.

1. Calculate the population of flies after 3 weeks without the spider:
     p(x) = 3(2)ˣ
     x = 3 (because it is the period of three weeks)
⇒  p(3) = 3 · 2³ = 3 · 8
     p(3) = 24

2. Calculate the number of eaten flies by the spider after 3 weeks:
      s(x) = 2x + 4
      x = 3 (because it is the period of three weeks)
⇒   s(3) = 2 · 3 + 4 = 6 + 4
      s(3) = 10

3. Subtract p(3) and s(3) to get  the population of flies after three weeks with the introduced spider:
    p(3) - s(3) = 24 - 10 = 14
Therefore, there are 14 flies after three weeks with the introduced spider.
6 0
4 years ago
A tepee has a circle floor with a diameter of 4 yards what’s the floors circumference
Firlakuza [10]

Answer:

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Step-by-step explanation:

The circumference of a circle is denoted by: C=\pi d, where d is the diameter.

Here, we are given the diameter, so d = 4.

Now, plug this into the equation:

C=\pi d

C=\pi *4 ≈ 12.57

The circumference is about 12.57 yards.

Hope this helps!

6 0
3 years ago
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Answer:

7

Step-by-step explanation:

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2x-4=10

then, add positive 4 to -4 and 10 because opposite signs cancel out

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Paladinen [302]

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Step-by-step explanation:

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