I'm guessing that the 2 in that is ^2? if so, it opens down.
The answer should be
4.
First, simplify

to 4. Your problem should look like: 4 x 1.
Second, multiply. 4 x 1 = 4 so that is your answer.
Also, to start the equation up, make sure to add in the numbers in replace for the letters. Your problem to start with should look like:

.
Answer: its 18.27
Step-by-step explanation:
0 lightbulbs would be expected to burn out in 1800 hours