The first graph is c. c - 7 < 3.
The second graph is a. c + 7 ≤ 3.
The third graph is b. c - 3 > 1.
Let
x-------------> <span>original price of the skates
we know that
15% of x is </span><span>$19.50
so
0.15x=19.50---------> x=19.50/0.15-----------> x=$130
the answer is
the </span>original price of the skates was $130<span>
</span>
Interior and exterior angle<span> formulas: The </span>sum of the measures<span> of the interior </span>angles<span>of a </span>polygon<span> with n sides is (n – 2)180. The </span>measure<span> of each interior </span>angle<span> of an equiangular n-gon is. If you count one </span>exterior angle<span> at each vertex, the </span>sum of the measures of the exterior angles<span> of a </span>polygon<span> is always 360°. Hope this helps ^^</span>
The volume of the styrofoam collar is approximately 1,960.35 
Step-by-step explanation:
Step 1:
The given styrofoam collar is a hollow cylinder. A hollow cylinder consists of an outer radius and an inner radius.
This given hollow cylinder has an outer radius of 8 inches and an inner radius of 5 inches. The height of the cylinder is 16 inches.
To calculate the volume of a hollow cylinder we subtract the volume of a cylinder constructed with the inner radius from the volume of a cylinder with the outer radius.
Step 2:
The volume of a cylinder, 
For the outer cylinder,
inches and
inches.
The volume of the outer cylinder, 
For the inner cylinder,
inches and
inches.
The volume of the inner cylinder, 
Step 3:
The volume of the styrofoam collar 
The volume of the styrofoam collar 
Rounding this off, we get the volume of the styrofoam collar as 1,960.35 