GMAT数学题,求救a certain culture of bacteria quadrupled every hour.if a container with these bacteria was half full at 10:00am,at what time was it one-eight full?但是答案上写是凌晨2点啊～为什么呢?

GMAT数学题,求救a certain culture of bacteria quadrupled every hour.if a container with these bacteria was half full at 10:00am,at what time was it one-eight full?但是答案上写是凌晨2点啊～为什么呢? GMAT一道数学题, 一道GMAT的数学题 a certain 求一道GMAT数学题.At a certain bookstore,the regular price of each book is 20 percent less than its list price.If during a sale the price of each book at the store was 15 percent less than its regular price,then the price of a book during the sa GMAT数学题,A certain clock marks every hour bystriking a number of times equal to thehour and the time required for a strokeis exactly equal to the time intervalbetween strokes.At 6:00 the timelapse between the beginning of thefirst stroke and the GMAT两大数学题求解答1.Each participant in a certain study was assigned a sequence of 3 different letters from the set {A,B,C,D,E,F,G,H}.If no sequence was assigned to more than one participant and if 36 of the possible sequences were not assi 关于GMAT数学题的问题on a certain transatlantic crossing,20 percent of a ship's passengers held round-trip tickets and also took their cars abroad the ship.if 60 percent of the passengers with round-trip tickets did not take their cars abroad 指数函数数学题求救 GMAT一道数学题$10,000 is deposited in a certain account that pays r percent annual interest compounded annually,the amount D(t),in dollars,that the deposit will grow to in t years is given by D(t) = 10,000 {1+(r/100)}t.What amount will the depos 一道GMAT数学题This year Henry will save a certain amount of hisincome,and he will spend the rest.Next year Henrywill have no income,but for each dollar that he savesthis year,he will have 1 + r dollars available to spend.In terms of r,what fract GMAT官方指导（OG）上的数学题What is the volume of a certain rectangular solid?(1) Two adjacent faces of the solid have areas 15 and 24, respectively(2) Each of two opposite faces of the solid has area 40我不理解第二个条件的意思 一道关于GMAT的数学题 just missed a certain date certain 求救数学题,关于数列的 初三数学题...大神求救🆘 a certain什么意思 in a certain way