What is the sun 60 degrees?

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

Using two or more complete sentences, describe how you can find a vector parallel to b=-2,3

I'll give brainliest if you answer right : )