If the dose requires that a total of 40 mg be given, then you take the ratio of the stock bottle (mg/mL) and solve for the total amount of mL that are needed by multiplying the amount of mL required (x):

Multiply by 5 on both sides to give:

Then solve for x:

Another, possibly quicker, way to solve would be to set up a proportion - one side the stock bottle ratio, and the other side the dosage requirements:

Cross multiply and you get:

And you would solve this the same way as above.
So
the patient should receive 9.091 mL of secobarbitol.
To understand the role of social health in your own life, think about the last time you were really sick and had to miss out on your usual daily activities. After a few days of lying in bed and not being able to participate in your favorite sports or hobbies or see your friends, you probably felt a little crazy. It's true that the emotional support and intellectual stimulation we receive in relationships with others helps us maintain a sense of belonging, which is a basic human need.
A. Fish
Fish carries the most bacteria