In a certain city there is a river running through the middle of the city. There are three islands and nine bridges as shown in the figure below.
North Bank
B
00
South Bank
Suppose there is a crossing charge of $1.00 every time one crosses a bridge. A tourist
wants to start on the South Bank, stroll across each of the bridges at least once, and
return to her hotel on the South Bank at the end of the trip.
What is the cheapest possible cost of such a trip?
$12
O $11
$10
$9
O None of the above

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