Question

Cindy wants to secure sequins on a piece of felt shaped like a trapezoid with a height of 10 cm. and bases of 15 cm. and 9 cm. what is the cost of all the sequins if sequins cost $0.80 per cm². of coverage?

Answer 1

Basically, this problem wants you to solve the area of the trapezoid given those dimensions, then multiply this to the unit cost to determine the total cost. The formula for the area of trapezoid is written below:

A = (a+b)h/2, where a and b are the lengths of the two bases

A = (15+9)(10)/2 = 120 cm²

Total Cost = 120 cm² * $0.80/cm² = $96