第一題你沒(méi)有把h那個(gè)方程寫(xiě)上來(lái),題目中說(shuō)上面給出了h的方程.
第二題就是個(gè)概率組合,怎么算都不是24啊.
如果是一個(gè)trainee帶三個(gè)plumbers,就是8
如果是一個(gè)trainee帶兩個(gè)plumbers是12
如果不分plumbers和trainees,就是在6個(gè)人里面選3個(gè),那就是20我也是算了20?。。】墒谴鸢傅拇_是寫(xiě)24的那就是答案有問(wèn)題吧。呵呵應(yīng)該也是~好心人能不能幫我看看第二題。。。
SAT兩道數(shù)學(xué)題求解答!
SAT兩道數(shù)學(xué)題求解答!
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
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
英語(yǔ)人氣：234 ℃時(shí)間：2020-05-13 17:33:45
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