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
aalyn [17]
3 years ago
10

In the standard (x,y) coordinate plane, what is the area of the circle x^2 + y^2 =169?

Mathematics
1 answer:
schepotkina [342]3 years ago
6 0

Answer:

169π

Step-by-step explanation:

circle eq: (x-a)²+(y-b)²=r², where (a,b) is center and r is radius

r²=169

r = ±13

since a radius length must be positive, r = +13, not -13

A of circle: πr²

r = 13

169π

given that the circle eq has r², you could've noticed that you can take the constant in the circle eq and multiply that by π to get the same answer

You might be interested in
Harvey Alson invested $7,500 in a 2-year CD that pays 6% interest compounded quarterly. What is the amount of interest that Harv
irga5000 [103]
A=7,500×(1+0.06÷4)^(4×2)
A=8,448.69

Interest earned=8,448.69−7,500
Interest earned=948.69
5 0
3 years ago
Read 2 more answers
What is the rate of return when 25 shares of Stock
7nadin3 [17]

Based on the information given the rate of return is 10.8%.

First step is to find the shares of stock price:

Shares of stock price=25 shares×$30/share

Shares of stock price= $750

Second step is to calculate the total sold price:

Total sold price= $825+$6

Total sold price= $831

Third step is to calculate the Rate of return:

Rate of return=$831-750/$750×100

Rate of return=$81/$750×100

Rate of return=10.8%

Inconclusion the rate of return is 10.8%.

Learn more about rate of return here:brainly.com/question/21691170

4 0
2 years ago
A circular swimming pool has diameter 60 feet and is centered in a fenced-in square region measuring 80 feet by 80 feet. a concr
borishaifa [10]
If I read the question correctly, the information about the 80x80 fencing and the grass region are all irrelevant information. 

In order to find the area of the side walk we are going to use the formula A=pi(r^2) where r = the radius. The diameter of the pool is 60 feet and the the sidewalk is 5 feet bigger all around meaning we had 5 feet to both sides of this 60 feet giving you an overall diameter of 70 feet (or 60 + 5*2). To find the radius take half of the diameter. 70/2 = 35. 

Now we plug in 35 to the equation. A = Pi(35^2) = 1225pi. Leave your answer like this as we are not finished and will need to round at the end for an accurate answer. This is NOT the end, that number is the area of the sidewalk AND the pool.

The sidewalk is not a full circle, just a border so we now have to find the area of the actual pool and subtract it from this 1225pi for the sidewalk's area. Same formula, Area = pi(r^2). The diameter of the pool is 60 meaning the radius is 30 (or 60/2). Plug into the equation, pi(30^2) = 900pi.

Now do 1225pi - 900pi to get 325pi. Break out your calculator and hit the approximation button. 325pi is approximately 1021.018 if rounded to 3 decimal places.

The area of the 5-foot wide sidewalk encircling the pool is approximately 1021.018 square feet. 


5 0
3 years ago
The break even point is the point at which income equals expenses expenses Richmond high school is paying $13,200 for the writin
KatRina [158]

Answer:

';lji

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Which ratio is the simplest form of ? A 2:1 B 21:14 C 3:2 D 2:3
Oxana [17]

Answer:

D 2:3

Step-by-step explanation:

The ratio can't get any smaller.

4 0
3 years ago
Other questions:
  • The polynomial p(x)=x^3+7x^2-36p(x)=x 3 +7x 2 −36p, left parenthesis, x, right parenthesis, equals, x, cubed, plus, 7, x, square
    13·2 answers
  • Can someone help me plz
    7·1 answer
  • Solve for "y"<br> 6.3=0.9y<br> y=
    10·1 answer
  • How are real numbers used to slove problems
    15·1 answer
  • You invest $2,000 in an account that has an annual interest rate of 3.2%, compounded annually. How much money will be in the acc
    6·1 answer
  • What is the GCF of two prime numbers
    14·2 answers
  • A scientist has
    6·1 answer
  • Plz help due tomorrow
    11·2 answers
  • PLEASE HELP ME FAST!! I am close to a 100 so please don't give me a wrong answer.
    13·1 answer
  • What equations best show that 48 is a multiple of 3.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!