Prove that: 7^16+7^14 is divisible by 50. Please help!!

True

7^16+7^14=7^14(7^2+1)=7^14(49+1)=7^14*50 divisible by 50

7^16/7^14=7^(16-14)=7^2

7^14/7^14=1 or 7^14/7^14=7^(14-14)=7^0=1

a^m:a^n=a^(m-n)

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.

you probably already have the answer but anyways it's b. 15.0

step-by-step explanation: