Answer:
13.15
Step-by-step explanation:
Answer:
8x10^-12
Step-by-step explanation:
Hope that helps.
Mean is 
and a standard deviation is 
, then the variable 
.
Use substitution
.
This substitution gives you that 
.
a. For X=130, 
and 
(the decimal value is taken from the Standard Normal Distribution Table).
b. For X=90, 
and for X=110, 
. Then 
(the decimal value is taken from the Standard Normal Distribution Table).
Answer:
1 3/4
Step-by-step explanation:
5 1/4 / 3 is equal to 1 and 3/4
12:15 does not belong, since that is a ratio of 4:5, whilst the others are all 3:4.
