The cost of producing 4 metal units is $204.80. the cost of producing 8 units is $209.60. what will it cost to produce 14 units?

Average acceleration: i have no idea how to do this.

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?