The answer is 10w.
40 divided by 4 is 10. The X and Y cancel out, leaving 4W.
Psi stands for pounds per square-inch.
It is a measure of pressure, and is the equivalent pressure of putting one pound on a square-inch of area.
For example, someone weighing 180 pounds standing on his feet, with a footprint area of 72 square-inches would exert a pressure of 180 pounds/72 square inches = 2.5 pounds per square-inch, or 2.5 psi.
Answer:
313
Step-by-step explanation:
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