5cakes cost £2.50 how much do 7 cakes cost?

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

In the diagram of circle a what is m

What is the first step of an indirect proof of a number that is divisible by two