Wednesday

July 23, 2014

July 23, 2014

Posted by **jennifer** on Wednesday, April 18, 2012 at 8:48pm.

- algebra -
**Reiny**, Wednesday, April 18, 2012 at 9:47pmweight = k r^3 , where k is a constant

when r = 2, weight = 5.6

5.6 = k(2^3)

k = 5.6/8 = .7

so weight = .7r^3

when r = 3

weight = .7(27) = 18.9

or ... just use a ratio

w/5.6 = 3^3/2^3

w = 5.6(27/8) = 18.9

**Related Questions**

12th grade - a ball with a r of 2inches weighs 2.40 lb.find the weight of a ball...

Math - A hi-tech bowling ball is constructed from concentric spheres, kind of ...

physics - One end of a wire is attached to a ceiling, and a solid brass ball is ...

math-help! - A croquet ball weighs 460 grams. Together a golf ball and a croquet...

algebra - the weight of an object varies inversely as the square of its distance...

math - A wooden ball 7 inches in radius sinks to a depth of 10 inches in a river...

math - if the weight of a fish varies jointly as the length and the square of ...

kcc ..... mechanics(sub) - 2 spherical ball aer kept inside ..weight of ball a ...

Math - DIRECT VARIATION 1. a is directly proportional to b.If a=15,then b=9 2. m...

math - a bowling ball has a diameter of 8.4 in. It is made of plastic that ...