Your answer would be 520 micrograms, hope this helps :)
Answer:
5%
Step-by-step explanation:
(labor force growing rate) +(efficiency of a unit of labor) = effective workers growing rate
<=> 3%+ 2% = 5%
Here we have to know the conversion between feet and inches.
1 Feet = 12 inches (This is given and is to be known)
So the 5 feet wide footbridge when converted to inches would be about 5*12 = 60 inches
The width of the footbridge in inches = 60 inches
Each wooden plank is 6 inches,
So the number of wooden planks that are required to build the foot bridge of 60 inches = 60/6 = 10 planks
Hence, the path path is 10 planks wide
Slope = Vertical rise / Horizontal run
Slope = 2 / 36
Slope = 1/18
Slope ≈ 0.0556