What is the y-interceptor the graph of the equation y = 4 ( 3^x ) ?

What is the missing constant term in the perfect square that starts with x^2 -20x

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )

597008.439431 to the nearest thousand