Rosalia perez ordered 120 pieces of jewelry: a number of bracelets at $7 each and a number of necklaces at $8 each. she wrote a check for $900 to pay for the order. how many bracelets and how many necklaces did rosalia purchase?

128.52

Step-by-step explanation:

Find the area of the figure by splitting it into two shapes - a trapezoid and a semi-circle.

The area of a semi-circle is found using A = 1/2πr² where r = 6 since the diameter is 12. A = 1/2π(6)² = 56.52.

The area of the trapezoid is found using A = 1/2(a+b)h = 1/2(12 + 6)(8) = 72.

Together the area is 56.52 + 72 = 128.52.