It only thousand you can't rounded to ten thousand
They are all pretty easy all you do is multiply the cost by the amount of things you buy. For example number 4 your variables are cost (c) and songs (s). Your equation is c•s so $0.99 • s. 50 songs would be .99 • 50 which is $49.50
I think that the correct answer is f(-1)=-8 and f(0)=-5
I hope this helps :D
(x^3 - y^3)(x^3 + y^3)
You can get this by factoring based on the a^2 - b^2 model
