Part 1
Answer: -4/11
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Part 2
Set the denominator function equal to zero and solve for x to find which values to kick out of the domain.
This shows that if x is equal to either of those values, then the denominator h(x) will be zero. These are the values to kick out of the domain to prevent a division by zero error. Any other value of x is valid in the domain.
Answer: 
This is a complicated question because part of the paddle is submerged, so the effective radius is somewhat less than r=0.68 feet. We'll ignore that.
We have f=14 revolutions per minute so the tip of our paddles moves at
That's it except we'll get the result in feet per minute which we have to convert to mph.
Answer: A
That's oddly close to the radius in feet because 
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If you are looking for the strenght of the electric field, then what you need to do is the following calculation:
E=F/q, and F=ma,
thus E=(ma)/q=(m· 2· x)/(t 2· q) = [(9.11×10-31kg)·2·(4.5m)] / [(3×10-6s)2(1.6×10-19C )]= 5.69 N/C
That is the strenght. Now that you know that the force is up and that the electron is negative then the projectile motion principles must be used
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Y=1/2x-1 (I think - I’ll check my answer and then come back)
