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 cu
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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 cu
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?
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 cu
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株约为0.26%（6次根号4-1）
B株约为0.32%（4次根号3-1）
不可能相等