SAT两道数学题求解答!1.At time t=0,a ball was thrown upward from an initial height of 6 feet. Until the ball hit the ground, its height, in feet, after t seconds was given by the function h above, in which c and d are positive constants. If th

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SAT两道数学题求解答!1.At time t=0,a ball was thrown upward from an initial height of 6 feet. Until the ball hit the ground, its height, in feet, after t seconds was given by the function h above, in which c and d are positive constants. If th

SAT两道数学题求解答!1.At time t=0,a ball was thrown upward from an initial height of 6 feet. Until the ball hit the ground, its height, in feet, after t seconds was given by the function h above, in which c and d are positive constants. If th
SAT两道数学题求解答!
1.At time t=0,a ball was thrown upward from an initial height of 6 feet. Until the ball hit the ground, its height, in feet, after t seconds was given by the function h above, in which c and d are positive constants. If the ball reached its maximum height of 106 feet at time t=2.5, what was the height, in feet, of the ball at time t=1?
答案是70
2.The Acme Plumbing Company will send a team of 3 plumbers to work on a certain job.The company has 4 experienced plumber and 2 trainees, how many different such teams are possible?
答案是24
哎呀傻了= =
方程：h(t)=c-(d-4t)^2

SAT两道数学题求解答!1.At time t=0,a ball was thrown upward from an initial height of 6 feet. Until the ball hit the ground, its height, in feet, after t seconds was given by the function h above, in which c and d are positive constants. If th
第一题你没有把h那个方程写上来,题目中说上面给出了h的方程.
第二题就是个概率组合,怎么算都不是24啊.
如果是一个trainee带三个plumbers,就是8
如果是一个trainee带两个plumbers是12
如果不分plumbers和trainees,就是在6个人里面选3个,那就是20

h(t)方程式将t=0 h=6, t=2.6 h=106代进去解方程
不过估计你已经上了大学一年多了。。

看都看不懂

孩子，你这个第二题都打都打错了。你回去看看题。正解应该是24. C 4 1 * C 4 2=24

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