What is 0.65625 Rounded to the nearest tenth of a percent?
Please help!!

Autility company burns coal to generate electricity. the cost c(p), (in dollars) of removing p percent of the some stack pollutants is given by c(p)= 85000p/100-p a) find the cost to remove 30% of the pollutant b) find where the function is undefined

Ineed if you could explain and give me the answer you! this needs done

Indicate the formula for the following conditions: p^c(n,r)=