Antti entered a $10$-kilometer race. his goal is to finish in one hour. he starts off sprinting, and completes the first $2$ kilometers of the race at an average speed of $12$ kilometers per hour.

to achieve his goal of a one-hour finish time, what average speed (in kilometers per hour) must antti maintain for the last $8$ kilometers of the race?

enter your answer as a number in decimal form, without units.

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