og11,math,99

xihonghui

on a scale that measures the intensity of a certain phenomenon, a reading of n+1 corresponds to an intensity that is 10 times the intensity corresponding to a reading of n.On that scale ,the intensity corresponding to a reading of 8 is how mnay times as great as the intensity corresponding to a reading of 3?
A 5 B 50 C 10的5次方,D 5的10次方E 8的10次方减去3的10次方.
the answer is C.
笨笨的,没有读懂题目,帮忙解释一下.

xihonghui

明白了.谢谢斑竹!!!!

himba

就是对数坐标

n=log(x)

n+1=log(x)+1=log(x)+log(10)=log(x*10)

所以n1=log(x1)=8,n2=log(x2)=3,

n1-n2=log(x1)-log(x2)=log(x1/x2)=5

所以x1/x2=10^(5)