Chamamos de fração geratriz a toda fração cuja divisão do numerador pelo denominador é igual a uma dízima periódica. Sabendo-se que 2,1666...=2+0,1+0,0666 entao a fraçao geratriz deste numero sera (A) 13/6 (B) 54/25 (C) 2/16 (D) 21/6

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.

v = 1/3 a^2h

step-by-step explanation:

the volume is 1/3 a^2h.

a

step-by-step explanation:

-8/2y-8=5/y+4-7y+8/y^2-16

we move all terms to the left:

-8/2y-8-(5/y+4-7y+8/y^2-16)=0

we can not solve this equation