Answer:
<h3>2√3</h3>
Step-by-step explanation:
The standard equation of a circle is expressed as;
(x-a)²+(y-b)² = r² where;
(a, b) is the center of the circle
r is the radius of the circle
Given the equation (x - 7)^2 + (y + 13)^2 = 12
On comparing;
r² = 12
Take the square root of both sides
√r² = √12
r = √12
r = √4*3
r = 2√3
Hence the radius of the circle is 2√3
Answer:
no worries :)
Step-by-step explanation:
There are 5,280 feet in a mile. so 52,800 feet is 10 miles.
Answer:
Step-by-step explanation:
Let the speed of plane is p and speed of the wind is w.
<u>Then we have:</u>
- 10*(p + w) = 1120 ⇒ p + w = 112
- 20*(p - w) = 1120 ⇒ p - w = 56
<u>Sum the two equations and solve for p:</u>
- p + w + p - w = 112 + 56
- 2p = 168
- p = 84
<u>Find w:</u>
- 84 + w = 112
- w = 112 - 84
- w = 28
For the answer to the question above,
Let's use the formula for finding the volume.
(pi) x 2/9 x 2/9 x r^2
(pi) x <u>2</u> x <u>2</u> x r^ 2 x 4h
9 9
simplify and solve.
The the will be
<u>16 </u>(pi) r^2h
81
I hope I helped you in my answer
