Atoaster oven has a power rating of 1200w. if you cook a pizza in it for 1 hour at 450°f, how many
joules of electrical energy are converted into heat by the toaster oven?

= 4,320,000 joules

Power is the ratio of Work per unit time. When work is done in a given span of time, the ratio of work performed with respect to time is called Power.

Therefore;

Power = Work done/time

Power = 1200 Watts and t = 1 hour or 3600 seconds

Thus;

Work done = Power × time

                   = 1200 ×  3600

                   = 4,320,000 joules or 4320 kJ

the answer is c i did the same question so i know that's right!

c. newton's third law of motion