98 Answered Questions for the topic radius

Radius

08/17/17

radius planet has 7 rings total radius of ring system
A planet has 7 rings. The first ring is 20,000 km from the center of the planet. Each ring is 50,000 km wide and 500 km apart. What is the total radius of the ring system from the planet's center?
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08/08/17

Maths, Co ordinate geometry
A circle has diameter AB, where A = (2, −5) and B = (−4, 7).(a) Find the centre C and radius r of the circle.(b) Use the distance formula to test whether P(6, −1) lies on the circle     Just... more
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Radius

07/08/17

Points/ endpoints of a circle
the endpoints of the diameter of a circle are D(7, -2) and E(11, -8). a) Determine the coordinates of the the centre of the circle. b) Determine the length of the circle's radius
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Radius

04/03/17

Find the length of the side of the square that has the same area as a circle with radius r cm.
Find the length of the side of the square that has the same area as a circle with radius r cm. Find the length of the side of the square that has the same area as a circle with radius r cm.
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Radius

04/03/17

The area of a circle is equal to 1 dm². Find the radius of the circle.
 The area of a circle is equal to 1 dm². Find the radius of the circle. The area of a circle is equal to 1 dm². Find the radius of the circle.
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03/22/17

the radius of a circle is 9 kilometers. What is the circles area?
use 3.14 as pie
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02/26/17

Find the center and the radius of the circle with equation?
x^2+y^2+6x-10y-10=0
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02/12/17

Cylindrical shells
Use the method of cylindrical shells to find the volume V of the solid obtained by rotating the region bounded by the given curves about the x-axis.x + y = 7, x = 16 − (y − 3)^2
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02/09/17

Extending Differentiation (Confused...)
VOLUME : A spherical balloon is inflated with gas at the rate of 500 cubic centimeters per minute. How fast is the radius of the balloon increasing at the instant the radius is (a) 30 cm and (b) 60... more
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Radius Circles

11/04/16

Circles Center and Radius
Center and radius of a circleA circle has the equation: (x - 5)^2 + y^2 = 8What are the center and radius of the circle?
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Radius

10/01/16

If the circumference of a circle is 26p millimeters, what is the radius of the circle?
How to solve? 
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Radius

09/27/16

Word problem
what is the radius of a circle with the circumference of 15.
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09/15/16

what is the radius of a circle with circumference 73yd? Write the formula in terms of r. Find the radius using the formula C=2(pi)r. Round to nearest tenth.
what is the radius of a circle with circumference 73yd? Write the formula in terms of r. Find the radius using the formula C=2(pi)r. Round to nearest tenth.
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Radius Algebra 2 Pi

09/05/16

The surface area of a sphere is 46(pi) cm². what is the radius of the sphere?
This is an algebra 2 question, and I don't know how to approach it. 
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07/18/16

Find a polynomial for the shaded area of the figure
The picture is a circle shaded inside with a radius of 5   I can't figure out how to answer the question.
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07/15/16

is there an equation to find the radius of a corner on a rounded rectangle?
I have a length of 5.8 inch and a width of 2.9 inch. i'm trying to figure out the radius of the corners on the rounded rectangle I have.
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06/21/16

A circle has an equation 49x^2+49y^2+14x+294y-48=0 find the Center, Radius and intercepts of the circle.
I need help solving this  equation: 49x^2+49y^2+14x+294y-48=0 find the Center, Radius and intercepts of the circle.  
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Radius

06/19/16

If the circumference of a circle is 37" how much does it decrease if I decrease the radius by 1/2"?
If my husband's waist size is 37", and a plastic surgeon says he can use a method to remove 1/2 INCH of fat from an area, how much will that decrease is waist size?  Or, if the circumference of a... more
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06/10/16

How long should the radius of the pool be?
Joe wants to build a circular pool in his backyard. The rectangular backyard measures 40 feet wide by 70 feet long. Joe wants the pool to be as large as possible, with the edge of the pool at least... more
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06/01/16

What is the magnitude of the centripetal acceleration of the car as it goes around the curve?
A 2,000-kilogram car travels at a constant speed of 15 meters per second around a circular curve of radius 20 meters. What is the magnitude of the centripetal acceleration of the car as it goes... more
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06/01/16

What is the mass of the car?
A rollercoaster track provides 6400 N of centripetal force on a rollercoaster car. The car travels at a speed of 22 m/s as it rounds a horizontal curve with a radius of 15 m. What is the mass of... more
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05/29/16

Acceleration, Safe or Not?
At the bottom of the loop of your roller coaster, the velocity is 30 m/s and the radius of the loop is 50 m. Is the amount of acceleration riders will experience in this loop considered safe? Why?... more
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Radius

05/18/16

find the area of a circle whose radius is 3x^3/4z^5
find the area of a circle whose radius is 3x^3/4z^5
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04/29/16

Volume & Similarity
a cylindrical bottles holds 1 litre of oil. A second cylindrical bottle has the same height but twice the radius. It also contains oil. a) explain why these bottles are not similar. b) How much oil... more
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Radius Circles

04/04/16

Circles and radius
Find the radius of each circle with the given measurement π = pi   Part A:   C=36π cm   Part B: C=42π ft   Part C: A=121π cm2   Part D: A= 734.41π ft2
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