Water will be both added to and drained from a bathtub at the same time for 5 minutes. the total amount of water added to the bathtub in litres will be modelled by the function f(t) = 5t, where t is the time in minutes. the total amount of water drained from the bathtub in litres will be modelled by the function g(t) = t2, where t is the time elapsed in minutes. how many litres of water will be in the bathtub after 4 minutes?

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