Tutors Answer Your Questions about Circles (FREE)
Question 482339: Consider the Venn diagram below. The numbers in the regions of the circle indicate the number of items that belong to that region. Since the diagram wont copy, the left circle "A" contains a "20", the right circle "B" contains a "50" and the center, shared space contains a "70".
Determine
n(A)
n(B)
P(A)
P(B)
P(A|B)
P(B|A)
Click here to see answer by Theo(3458)   |
Question 483783: The points (-3,-1) and (9,4) are the endpoints of the diameter of a circle. Find the length of the radiu of the circle.
I have used the midpoint equation to get (3,3/2) as the mid point. So now I was using the standard equation of a circle to try an get the radius but I seem to be doing something wrong. The answer in my book says it is 6.5 but I keep getting 6.25 or 6.2. I would Rely like to see all the steps taken to get the answer. Can u help me?
Click here to see answer by mananth(12270)  |
Question 486044: Find an equation for a circle satisfying the given conditions:
The points (7, 13) and (-3, -11) are at the ends of a diameter.
The answer is: (x-2)^2 + (y-1)^ = 169
I need to know HOW to get this answer... I can get all the way to achieving the first aspect of the answer, but I can't seem to get the answer 169... I end up with 26?
Thank you in advance to anyone who can help.
Click here to see answer by Edwin McCravy(8879)  |
Question 486808: A circular fountain has a diameter of 10 meters. How many square shaped tiles are needed to cover the bottom if each tile is 1 square decimeter?
Here's my answer, but I may have put the decimal in the wrong place:
100dm A= 3.14(50)2
A= 3.14(2500)
A= 7850 dm2 x $.69
Total cost= $5416.50
That seems really high for the cost. Should it be $541.65? Did I forget a step? Did I convert the meters to decimeters incorrectly?
Click here to see answer by chessace(471)  |
Question 490553: A landscape architect used the entire length of an 80-foot rope to lay out a flower bed in the shape of a square. in another area, he used the entire length of the same rope to lay out a second flower bed in the shape of a circle. The perimeter of the square is 80 feet. The circumference of the circle is 80 feet. How many square feet greater is the area of one flower bed than the other? ( use 3.14 for pie) * if possible could you please explain how you got your answer , i couldnt solve this problem for hours!
Click here to see answer by ankor@dixie-net.com(15622)  |
Question 498085: If a square is drawn inside of a circle such that its four corners are touching the interior edge of the circle, what is the ratio of the area of the square to the area of the circle? You should calculate and express your answer as a decimal ratio (i.e. .328 : 1)
Click here to see answer by ankor@dixie-net.com(15622) |
Question 498857: A circle of radius 25 units has a chord going through a point that is located 10 units from the center. What is the shortest possible length that the chord could have?
A)25 units
B)(sqrt of 525) units
C)40 units
D)(sqrt of 2100) units
Click here to see answer by htmentor(788)  |
Question 504167: Tarry is a farmer. She decides to make a circular pen for her sheep. She uses all of the fencing she has to make the fence (i.e. circumference =100) She then decides to make a square enclosure inside the circle, so that the corners of the square just touch the circle. What would be the squares perimeter?
She then decides to make a square enclosure around the outside of the circle. What would the outside squares perimeter be?
I found the radius of the circle=15.92.
I found the diameter of the circle=31.8.
The area of the circle 795.
But im lost on getting any information of the square inside the circles.
My thoughts on a diameter is diagnol line inside the circle where it can also go straight across and i think that is whats throwing me off.
My guess id the perimeter of the inner square is 10.
Please help.
Click here to see answer by Theo(3458) |
Question 505281: I am trying to determine if this equation is a circle and give center and radius. I know it is a circle because x and y have equal coefficients and I know the formula but I can't figure how to set it up. Equation is: x^2+y^2-12x+10y = -25. Thank you
Click here to see answer by nerdybill(6948)  |
Question 509704: The circumference of the wheel of the tricycle of Timothy is 1/4 of the wheel of the car from his father. If the circumference of the wheel of his father is 16 π (pi), which is the radius of the wheel of Timothy?
Click here to see answer by edjones(7569)  |
Question 510115: I'm supposed to find the standard form of the equation of a circle. The question is center at the origin containing the point: (-2,3). I have no idea where to begin. I've been working on this problem for about 2 hours. That answer in the back of the book is x^2+y^2=13.
Click here to see answer by scott8148(6628)  |
Question 510115: I'm supposed to find the standard form of the equation of a circle. The question is center at the origin containing the point: (-2,3). I have no idea where to begin. I've been working on this problem for about 2 hours. That answer in the back of the book is x^2+y^2=13.
Click here to see answer by Earlsdon(6287) |
|
Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295
|
