Please help I would appreciate it !!

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

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

The triangles are similar. what is the value of x? show your work.