Mark bought a rare baseball card for $25. he found out it is now worth $30. what is the percentage increase in the cards value?

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

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?