Let's make the first even integer m and the second even integer n. The square of the first, decreased by the second is 130 is:

-n=130 ---> Add n to each side

=130+n ---> Take the square root of each side
m=±

Let's look at the first square number above 130, which is

. <em>m</em> is 12, therefore the next consecutive even integer is 14.

=144
144-14=130
The two consecutive integers are 12 and 14
3a; Rectangle
3b; Square
3c;Trapezoid
There are six marbles total.
565.487 units cubed
hope this helps:)