Answer:
"Biofuels"
Explanation:
I don't know if this counts but I guess it's not one of those.
Boats float because the gravity is acting down on it and the buoyant force is acting up on the ship.
Answer:
$5.184
Explanation:
The cost can be calculated using the formula: 
Before using this, we require the following conversions:
<em>320 W → kW:</em>
<em>30 Days → Hours:</em>

Using the above stated formula:
