You make and sell triangular flags. Each flag has a base of 3.5

feet and a height of 2.5
feet. Fabric for the flags costs $0.40
per square foot. What is the cost to make one flag?

A triangle with side length 3.5 feet and height 2.5 feet.
CHECK
$

The area of a triangle is given by the formula (base * height) / 2.

In this case, the base is 3.5 feet and the height is 2.5 feet.

So the area of the flag is (3.5 * 2.5) / 2 = 4.375 square feet.

The cost of fabric for one flag is 4.375 * $0.40 = $1.75.

Therefore, the cost to make one flag is $1.75.