Angela painted 3/8 of the room and todd painted 2/5 of the same room how much of the room is left to paint?

Can any one me with the answers to these questions asap?

The federal reserve controls certain interest rates in the united states. investors often try to speculate as to whether the federal reserve will raise or lower rates and by how much. suppose a company conducts extensive interviews with financial analysts, and as a result, predicts that "thefed" will increase rates by an average of 0.25 percentage points every six months for the forseeable future. which type of equation could be used to model the predicted interest rates over the next several years, assuming no other significant changes? a) a linear equation b) a quadratic equation c) a polynomial equation d) an exponential equation

Mason bought 8 1/4 feet of wire. he cut off a piece of wire 3 5/12 feet long and used it for his science project. how much wire did mason have left?