Respuesta :
I could give you a formula but it's really simple. Every 5 Minutes the Truck empties 30 cubic feet, thus 0=190, 5=160 etc, your Answer is 10 Minutes until the truck empties to 40 cubic feet.
Hi!
The rate of change for the cement is either 5/30 or 30/5 (30/5 would equal to 6)
The rate of change for the cement is either 5/30 or 30/5 (30/5 would equal to 6)