There are two separate strains of bacteria growing in the la
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There are two separate strains of bacteria growing in the lab.Strain A starts with 35mg and quadruples its mass every 6 hour,strain B starts with 85mg and triples its mass every 4 hours.
a.) What is the growth rate of each culture?
b.) When will the cultures have the same mass?
a.) What is the growth rate of each culture?
b.) When will the cultures have the same mass?
有两种在实验室中生长的细菌品种.菌种A初始是35mg并且每6小时质量增加4倍,菌种BA初始是85mg并且每4小时质量增加3倍.
a.)每个培养皿(中的细菌)的增长速度是什么?
b.)什么时候两个培养皿中的细菌有相同的质量?
answer:
a.) the growth rate of strain A is 35*(4-1)/6 = 17.5 (mg/h)
the growth rate of strain B is 85*(3-1)/4 = 42.5 (mg/h)
b.) We suppose the time is t hour,then:
35 + t * 17.5 = 85 + t * 42.5
=> t < 0 ,so I think the data is wrong.
答案:
a.) A的增长速度是 35*(4-1)/6 = 17.5 (毫克/小时)
A的增长速度是 85*(3-1)/4 = 42.5 (毫克/小时)
b.) 假设时间为t小时后两者质量相等,则:
35 + t * 17.5 = 85 + t * 42.5
=> t < 0 ,所以我认为数据是有错误的.
a.)每个培养皿(中的细菌)的增长速度是什么?
b.)什么时候两个培养皿中的细菌有相同的质量?
answer:
a.) the growth rate of strain A is 35*(4-1)/6 = 17.5 (mg/h)
the growth rate of strain B is 85*(3-1)/4 = 42.5 (mg/h)
b.) We suppose the time is t hour,then:
35 + t * 17.5 = 85 + t * 42.5
=> t < 0 ,so I think the data is wrong.
答案:
a.) A的增长速度是 35*(4-1)/6 = 17.5 (毫克/小时)
A的增长速度是 85*(3-1)/4 = 42.5 (毫克/小时)
b.) 假设时间为t小时后两者质量相等,则:
35 + t * 17.5 = 85 + t * 42.5
=> t < 0 ,所以我认为数据是有错误的.
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