To find the area of the rack we just need to evaluate the givens values in the formula. The area of a triangle is given by
[tex]A=\frac{b\times h}{2}[/tex]Where b represents the base and h represents the height. Since the ball rack has a base of 6 inches and a height of 10.4 inches, its area is given by
[tex]A=\frac{6\times10.4}{2}=31.2[/tex]The area of the ball rack is 31.2 in².