How much energy did the oven supply to heat the cookie sheet?

To determine how much energy the oven supplied to heat the cookie sheet, you would need to know the specific heat capacity of the material, the mass of the cookie sheet, and the temperature change it experienced. The formula used is ( Q = mc\Delta T ), where ( Q ) is the energy supplied, ( m ) is the mass, ( c ) is the specific heat capacity, and ( \Delta T ) is the change in temperature. Without specific values for these variables, the exact amount of energy cannot be calculated.