请XDJM们帮我解释几道数学题,本人数学很差,所以麻烦各位解释稍微多点,多谢了! 1.. a certain culture of bacteria quadruples every hour. if a container with these bacteria was half full at 10:00a.m., at what time was it one-eighth full? A. 9:00am B. 7:00am C. 6:00am D. 4:00am E. 2:00am 答案是A
2.a certain basketball team that has played 2/3 of its games has record of 17 wins and 3 losses. what is the greatest number of the remaining games that the team can lose and still win at least 3/4 of all of its games?A.7 B.6 C.5 D.4 E.3 答案是D
3. there were 36000 hardback copies of a certain novel sold before the paperback version was issued. from the time the first paperback copy was sold until the last copy of the novel was sold. 9 times as many paperback copies as hardback copies were sold. if a total of 441000 copies of the novel were sold in all, how many paperback copies were sold? A. 45000 B. 360000 C.364500 D.392000 E396900 答案是C