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Answer:

Step-by-step explanation:
We are given the following in the question:

where r and r are the radius of the circle.
General equation of circle:

where(h,k,j) is the center of the circle and r is the radius of circle.
If the circle is centered at origin, then,

Equation of circle with radius R centered on origin

Inequality to describe the region that consist of all points lying between the sphere of radius r and R but not on the sphere is given by:

One piece is 4 ft long and the other is 20 ft long
Answer:
4/7
Step-by-step explanation:
ajsgskajsgsujavagajana ahakangssua
<span>3 black ribbons and 12 green ribbons
so P(</span><span>Lila selects a black ribbon)=3/(3+12)
=1/5
</span>2 black ribbons and 12 green ribbons left
P(<span>Jessica selects a green ribbon)=12/(12+2)
</span>=6/7
so P(<span>Lila selects a black ribbon and Jessica selects a green ribbon)
</span>=1/5*6/7
=6/35
ans is D