How much are Cheryl's iguanas costing her in electricity each year?

Question

My friend Cheryl keeps pet Iguanas. She leaves 2.0 heat lamps on for them year round, each of which uses 402.0 watts. Her electricity costs 13.0cents a kilowatt-hour at all times. Calculate how much these silly Iguanas are costing her in electricity each year, in dollars.

Answer 1

Why are these Iguanas silly?

(2)(402)(0.13)(24)(365)

You can do the multiplication.