1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vitek1552 [10]
3 years ago
11

Find the radius of a circle with an area of 380 in².

Mathematics
1 answer:
Likurg_2 [28]3 years ago
5 0

Answer:

11 inches

Step-by-step explanation:

The area of a circle can be found using:

a=\pi r^{2}

We already know that the area is 380, so we can substitute 380 in for a.

380=\pi r^2

Now, we need to find the radius. To do this, we need to get r by itself

First, divide both sides by pi

380/\pi =\pi r^2/\pi

120.95775675=r^2

Since r is being squared, we need to take the square root of both sides

\sqrt{120.95775675}=\sqrt{r^2}

10.9980796846=r

If we round to nearest whole number, our radius is 11 inches

You might be interested in
I will give brainlist to the most helpful answer to my question
sdas [7]

Answer:

See below

Step-by-step explanation:

Both horses travel 0 miles in 0 minutes. We can see this on the graph where both lines start at the 0 in the bottom left corner. For the purpose of writing the equations this also shows us that the y-intercept is 0. In a slope-intercept equation, y=mx+b, that number is the b. b is zero in both equations, so we don't need to write anything for that.

For horse A, we can see on the graph that at 4 minutes, horse A has traveled 1 mile. Also, confirming this rate, at 8 minutes, it went 2 miles. This will help us find the rate. The rate will be the number we fill in for the m in the y=mx+b equation. Horse A goes 1mile every 4 minutes. That is a rate of 1/4 miles per minute. So Horse A's equation will be

y = (1/4)x You can make it more *intuitive* possibly by using m for miles and t for time instead, like this:

m = (1/4)t

Horse B is a little bit faster, and you can see this bc the line is a little bit steeper. It goes 2 miles in 5 minutes (confirm you can see it goes 4 miles in 10 minutes)

So Horse B's equation is

y = (2/5)x

or miles = (2/5)time

Mathematically, the equations are the same whether you use x,y or m,t

If Horse A runs for 12 minutes then it will run

miles = (1/4)minutes

miles = (1/4)(12)

miles = 3

If Horse B runs for 12 minutes, then it will run

miles = (2/5)minutes

miles = (2/5)12

miles = 4.8

7 0
2 years ago
Simplify. Y/3 + 1/y^2/9 - 1
Rudik [331]
Hope this is understandable.

8 0
3 years ago
Read 2 more answers
Leilani practiced piano for 3/5 of an hour. Sarah practiced piano for 7/8 of an hour.
ivolga24 [154]

Answer:

The number of hours did Sarah practice more than Leilani is \dfrac{11}{40}  hours  .

Step-by-step explanation:

Given as :

The time for which Leilani practiced piano = \dfrac{3}{5} hours

The time for which Sarah practiced piano = \dfrac{7}{8} hours

Let the number of hours did Sarah practice more than Leilani = T hours

<u>Now, According to question</u>

The number of hours did Sarah practice more than Leilani = \dfrac{7}{8} hours -  \dfrac{3}{5} hours

Or, T =  \dfrac{35-24}{40} hours

Or, T =  \dfrac{11}{40} hours

So,The number of hours did Sarah practice more than Leilani = T =  \dfrac{11}{40}  hours

Hence, The number of hours did Sarah practice more than Leilani is \dfrac{11}{40}  hours  . Answer

3 0
3 years ago
Figure A was drawn first and figure B was drawn second. What is the scale factor?
kakasveta [241]
The answer is A because you are multiplying it by 2
3 0
2 years ago
A 263 kg motorcycle moves with a velocity of 5 m/s. What is its kinetic energy? ______ joules
Andreyy89

K.E= \frac{1}{2} mv^2

K.E= Kinetic Engery
M=Mass
V=Velocity 
m=263kg
v=5m/s 

Plug the given info into the formula: 
K.E= \frac{1}{2} (263)(5)^2

Final answer: <span>3287.5J </span>
7 0
2 years ago
Other questions:
  • If PX = 56, Find (x - 2)!
    11·1 answer
  • 7x + 1 = x + 7<br> whats the answer
    8·2 answers
  • I need helpppppppp :(
    9·2 answers
  • I don't get how to even do this its solving equations with variables on each side. 8y-3=6y+17
    8·1 answer
  • If you have 8 cups of punch &amp; 15% sorbet in it how many cups of sorbet do you use
    7·1 answer
  • Linear function f(x) = x is graphed on a coordinate plane. The graph of a new line is formed by changing the slope of the origin
    10·1 answer
  • Multiply. Express your answer in simplest form. 9 1/6 × 1 1/11
    11·2 answers
  • PLEASE HELPPP !!!!!!!!
    11·1 answer
  • Divide 837 by 36 how you can do it
    11·1 answer
  • Solve the equation<br> 5x=-7x+6
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!