All categories

4 years ago

Express the area of a circle, a, as a function of its circumference, c.

1 answer:

7 0

Area = PI * radius^2

Circumference = 2 * PI * radius
radius = Circumference / 2 * PI

So, Area = PI * (Circumference / 2 *PI) * (Circumference / 2 *PI)
So, Area = Circumference^2 / (4*PI)

You might be interested in

Elisa saved $30 in July,$21.50 in august, and $50 in September. He spent $18 on movies and $26.83 on gas. how much money does El

Eva8 [605]

Answer:

$56.67

Step-by-step explanation:

$30+$21.50+$50=101.50

$101.50-$18=$83.50

$83.50-$26.83=$56.67

4 0

3 years ago

Theorem 8.18 and the Pythagorean Theorem to find the side lengths of the kite . Write the lengths in simplest radical form and a

Viktor [21]

Answer:

$|WX|=|XY|=\sqrt{18} =3\sqrt{2}\:Units \:or\: 4.2 \:Units\\|WZ|=|YZ|=\sqrt{34} \:Units \:or\: 5.8 \:Units$

Step-by-step explanation:

Theorem: The diagonals of a kite are perpendicular.

Let O be the point of intersection of the diagonals,

Applying Pythagoras Theorem, in right triangle WOX

$|WX|^2=|WO|^2+|OX|^2\\|WX|^2=3^2+3^2=18\\|WX|=\sqrt{18} =3\sqrt{2}\:Units \:or\: 4.2 \:Units$

Applying Pythagoras Theorem, in right triangle WOZ

$|WZ|^2=|WO|^2+|OZ|^2\\|WX|^2=3^2+5^2=34\\|WZ|=\sqrt{34} \:Units \:or\: 5.8 \:Units$

4 0

3 years ago

4=x^2-7 solve each equation

jolli1 [7]

Answer:

√11

Step-by-step explanation:

4 = x^2 -7

Add 7 to both sides

11 = x^2

Square root both sides

√11 = x

8 0

3 years ago

Read 2 more answers

Two mechanics worked on a car. The first mechanic worked for

sergij07 [2.7K]

76.25 is the answer because 1525 divided by 20 equals 76.25

8 0

3 years ago

21x =7? A. x=3 B. None of these C. x=147 D. x=28

Varvara68 [4.7K]

Answer: B

Step-by-step explanation:

To isolate x, you divide both sides by 21

21x=7

$\frac{21x}{21}=\frac{7}{21}$

x = 7/21

Simplify by dividing both the numerator and denominator by 7

x = 1/3

Since, 1/3 is not an option, B is the correct answer

6 0

2 years ago