Becky is building a square rabbit cage. the length and width are both 3 feet less than the square dog pen she built for her dog. the area of the rabbit cage is 25 ft.
a. using d to represent the side of the square dog pen, write an expression to represent the area of the rabbit cage.
b. use the expression and the given area to find the length of a side of the square dog pen.
c. how many feet of fencing is needed to enclose the 4 sides of the rabbit cage? (show work)

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.