math question,somebody help
题目
math question,somebody help
1.One-fourth of a 10-m by 10-m rectangular garden is planted with corn.
Two-tenths of the garden is planted with squash.
Thirty-five hundredths of the garden is planted with beans.
The rest is planted with flowers.
What fraction of the garden is planted with flowers?
2.A snail is trying to reach a leaf 8 m away.
The snail crawls 4 m on the first day.
Each day after that,it crawls one-half as far as the previous day.
After 4 days,will the snail reach the leaf?How do you know?
答案
1、three-twentieth
2、no,it can't reach the leaf
there's still half a meter left.
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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