How do you find the circumference of a cirlcle?

2 answers:

7 0

There are 2 formula to find the circumference of a circle.

$\huge{\boxed{\bf{Circumference=2\pi r}}}$

$\huge{\boxed{\bf{Circumference=\pi D}}}$

$\pi$ is approximately 3.14
r is radius
D is diameter

and just a side note, $\huge{\boxed{\bf{2 r = D}}}$
Hope that formula helps you :)

Maksim231197 [3]3 years ago

5 0

Answer:

2rPi:

Step-by-step explanation:

You can multiply the radius by 2, which gives you the diameter. Then you multiply by Pi, which is 3.14 OR 22/7. If you are in Khan Academy, don't use 22/7.

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Part 2

Taya2010 [7]

9514 1404 393

Answer:

a. -4

Step-by-step explanation:

When using the "diamond method" for factoring quadratics, the bottom number is the coefficient of the linear term. In this quadratic, it is -4.

The bottom number is -4.

4 0

3 years ago

Read 2 more answers

Find an expression for a cubic function f if f(4) = 96 and f(-4) = f(0) = f(5) = 0. Part 1 of 4 A cubic function generally has t

Bezzdna [24]

Given a polynomial $p(x)$ and a point $x_0$ , we have that

$p(x_0) = 0 \iff (x-x_0) \text{\ divides\ } p(x)$

We know that our cubic function is zero at -4, 0 and 5, which means that our polynomial is a multiple of

$(x+4)(x)(x-5) = x(x+4)(x-5)$

Since this is already a cubic polynomial (it's the product of 3 polynomials with degree one), we can only adjust a multiplicative factor: our function must be

$f(x) = ax(x+4)(x-5),\quad a \in \mathbb{R}$