What is the solution to the system graphed below?

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Which statement is true about the discontinuities of the function f(x) = x-5/ 3x^2-17x-28