What is the exact distance between and ?

Step-by-step explanation:

d^2 = (x2 - x1)^2 + (y2 - y1)^2

x1 = 9

x2 = -1

y1 = -3

y2 = 8

d^2 = (-1 -9)^2 + (8 - - 3)^2

d^2 = (-10)^2 + 11^2

d^2 = 100 + 121^2

d^2 = 221

221 is not prime, it is 13 * 17 which doesn't factor down any further.

So

d = sqrt(221)

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.

if e is the midpoint of bd, then bd is 14.

step-by-step explanation: