Hello, doctorgk!

They could have used a nicer general form . . .The area of a parabolic arch is equal to the product of the base and the height.

Prove this formula for the general parabolaFor the x-intercepts: .Code:| h* * | * * | * * | * | - -*- - - + - - -*- - b | b

We have: .

. .

Since , we have: .