How much work will a machine with a power rating of 1.1..*.10³ watts do in 2.0 hours?

Question

unklerhaukus · Answer

For constant power 
Work equals power times time 
$$W=PT$$

unklerhaukus · Answer

$$\quad=1.1\times10^3[\text W]\times2.0[\text h]\
\quad=(1.1\times2.0\times10^3)[\text W\cdot\text h]$$

unklerhaukus · Answer

maybe your final answer is best in units of kilowatthours [kWh]

anonymous · Answer

the answers are 
1.5*10^6 jolues
2.1*10^6 jolues
4.0*10^6 jolues
8.1*10^6 jolues

unklerhaukus · Answer

oh you have to convert to joules

unklerhaukus · Answer

A watt is a joule second $$[\text W]=[\text J\cdot \text s]$$

An hour is 
$$[\text h]=60[\text{min}]=3600[\text s]$$

anonymous · Answer

i found the answer thanks tho:) how about this one?
The ideal mechanical advantage of an inclined plane is 3.5, and its efficiency is 0.6. What is the mechanical advantage of the inclined plane?

unklerhaukus · Answer

Im not getting any of your options

was the power ment to be 1.125 x 10^3  [W] ?

anonymous · Answer

it was -2.1*120^6

unklerhaukus · Answer

i dont know how you can get a negative number

anonymous · Answer

i didnt get the answer i guessed it and i got it wrong,