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Ksivusya [100]
3 years ago
6

I just need to answer something so i can see these messages whose trynna help me

Mathematics
1 answer:
Dima020 [189]3 years ago
3 0

Answer:

whats the question

Step-by-step explanation:

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That's the question ?? ​
Oksanka [162]

Step-by-step explanation:

Before we answer, the area of a Circle given it radius is

a = \pi r {}^{2}

The area of a circle given it diameter is

a =  \pi( \frac{d}{2} ) {}^{2}

So let answers question 1-4.

1. The area is

1024\pi

2. The area is

576\pi

3.

1.225\pi

4.

309.76\pi

For the 5th problem, circumference is

\pi \times d

where d is the diameter and

2\pi  r

where r is the radius.

A circumference of 100 m means the radius is 50 because

2\pi \times r = 100\pi

r = 50

So this means the area is

2500 {\pi}

3 0
3 years ago
The driver of a 810.0 kg car decides to double the speed from 23.6 m/s to 47.2 m/s. What effect would this have on the amount of
Setler [38]

Answer:

  • KEi = 2.256×10^5 J
  • KEf = 9.023×10^5 J
  • 4 times as much work

Step-by-step explanation:

The kinetic energy for a given mass and velocity is ...

  KE = (1/2)mv^2 . . . . . m is mass

At its initial speed, the kinetic energy of the car is ...

  KEi = (1/2)(810 kg)(23.6 m/s)^2 ≈ 2.256×10^5 J . . . . . m is meters

At its final speed, the kinetic energy of the car is ...

  KEf = (1/2)(810 kg)(47.2 m/s)^2 ≈ 9.023×10^5 J

The ratio of final to initial kinetic energy is ...

  (9.023×10^5)/(2.256×10^5) = 4

4 times as much work must be done to stop the car.

_____

You know this without computing the kinetic energy. KE is proportional to the square of speed, so when the speed doubles, the KE is multiplied by 2^2 = 4.

8 0
3 years ago
Which of the following is protected by the FDIC?
Dmitrij [34]
The answer is C - Money Market Account
8 0
3 years ago
What Greek mathematician is known as the father of Geometry?
Luden [163]
C. Euclid is known as the father of Geometry

6 0
4 years ago
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AWNSER ALL ILL GIVE YOU BRAINLIEST
LekaFEV [45]

Answer:

hiii can i get brainliesthiii can i get brainliest

Step-by-step explanation:

6 0
3 years ago
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