A tribe has 4 letters in its alphabet. A word in the tribe is any sequence of 5 or less letters. How many words are in the tribe? (you can repeat letters)

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? )