Final answer:
The least possible value of c is 10 ft.
Step-by-step explanation:
The formula for the area of a triangle is given by:
area = (1/2) × base × height
Given that the base of the triangle is 12 ft, and we want the area to be greater than or equal to 60 ft, we can solve for the least possible value of the height (c) using the formula:
60 = (1/2) × 12 × c
Simplifying the equation, we get:
120 = 12c
Dividing both sides by 12, we find that the least possible value of c is 10 ft.