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DAY 19, IT'S NOT 10 BECAUSE ON DAY 20 SHE DOUBLED FROM DAY 19, SO 19 MUST BE HALF THE SIZE OF THE POND SIX HUNDRED. WE KNOW THAT 5%, OR 30 OF THE MEN ARE WEARING ONE EARRING. OF THE OTHER 95%, OR 570, WE KNOW THAT HALF ARE WEARING TWO EARRINGS AND THE OTHER HALF NONE. THIS IS THE SAME AS IF THEY ALL WORE ONE AUDREY WILL REACH THE DESTINATION FIRST. SUPPOSE THEY COVER 12 MILES, BOTH WALKING AT A RATE OF 2 MILES PER HOUR AND RUNNING AT A RATE OF 6 MILES PER HOUR. USE THE FORMULA: RT = D (RATE X TIME = DISTANCE) TO FIND EACH PERSON'S TIME. NANCY (WALKS HALF THE DISTANCE AND RUNS HALF THE DISTANCE): 2T = 6 MILES, SO T = 3 HR. WALKING 6T = 6 MILES, SO T = 1 HR. RUNNING T = 4 HOURS TOTAL TIME AUDREY (WALKS HALF THE TIME AND RUNS HALF THE TIME): 2(0.5T) + 6(0.5T) = 12 MILES T + 3T = 12 4T = 12 T = 3 HOURS TOTAL TIME THREE MEN. THE THREE MEN CHOP DOWN THREE TREES IN THREE HOURS. THE SAME THREE MEN CHOP DOWN THREE MORE TREES IN ANOTHER THREE HOURS. THIS GIVES A TOTAL OF SIX TREES IN SIX HOURS WITH THREE MEN