神马作文网英语数学题,请大家帮忙,谢谢!
来源：学生作业帮 编辑：神马作文网作业帮 分类：英语作业 时间：2024/11/18 21:08:11
英语数学题,请大家帮忙,谢谢!
The president of the first national bank is responsible for making wise investments of the bank 's funds . he made some investments form which the bank will earn $2.3 million . if he can buy some municipal bonds that yield 8% interest annually, how much money must he invest so that the total interest income for the bank will be at least $2500000?请写步骤,谢谢!
The president of the first national bank is responsible for making wise investments of the bank 's funds . he made some investments form which the bank will earn $2.3 million . if he can buy some municipal bonds that yield 8% interest annually, how much money must he invest so that the total interest income for the bank will be at least $2500000?请写步骤,谢谢!
题意如下：国家第一银行的行长有责任将银行的资金投资到合适的地方.他有一些投资选择,一共挣了2300000美元.如果他能投资一些年利率为8%的选择,他需要投资多少才能总共至少为银行赚2500000美元?
解法如下：设还需再投资x美元
则x*8%+2300000>=2500000
x*8%>=200000
x>=2500000
所以最少还要投资$2.5 million（2500000美元）
解法如下：设还需再投资x美元
则x*8%+2300000>=2500000
x*8%>=200000
x>=2500000
所以最少还要投资$2.5 million（2500000美元）