Homework Help: math

Posted by jimmy on Sunday, February 5, 2012 at 1:15am.

each of the 15 student council members of Blakemore Elementary School is responsable for telling exactly 2 other students about the upcoming school pep assembly. Each of those 2 is then responsable for telling 2 other students. It takes 15 minutes for each round of stundents to be told. How many minutes will take for 1,000 students to recive the information about the pep assembly ?

math - Reiny, Sunday, February 5, 2012 at 8:03am
end of round1 -- 30 students -- 15 minutes

round2 -- 60 -- 30 min
round3 -- 120 -- 45
round4 -- 240 -- 60
round5 -- 480 -- 75
ruond6 -- 960 -- 90
round7 --1920 -- 105

what do you think?
math - jimmy, Sunday, February 5, 2012 at 11:36am
ty

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