# Thread: Calculus word problem [am I solving this problem right so far?]

1. ## Calculus word problem [am I solving this problem right so far?]

Please check the image attached to see the problem and the work I completed. Thank you in advance!

2. ## Re: Calculus word problem [am I solving this problem right so far?]

(a) Under the federal requirement, 75% of the pollutants must be removed. Cost to achieve that level (in Millions of dollars) is

$C(75) = \dfrac{10(75)}{100-75} = \dfrac{750}{25} = 30 \text{ million dollars}$

80% of the 100,000 population = 80,000 are property owners

fair share in dollars for each property owner would be $\dfrac{30,000,000}{80,000} = 375 \text{ dollars}$

get the idea?

3. ## Re: Calculus word problem [am I solving this problem right so far?]

Yea now I understand a do we still assume that it’s shared evenly for b and c

4. ## Re: Calculus word problem [am I solving this problem right so far?]

Originally Posted by skhee
Yea now I understand a do we still assume that it’s shared evenly for b and c
That would be a valid assumption since there's nothing in the problem statement to the contrary.