Can someone help me with this asap

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

Which graph represents an even function?

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol