Hi there! So, there are 40 doses in 1 bottle. To find out the number of doses in 3 1/3 bottles, we have to multiply both numbers together. 3 1/3 as an improper faction is 10/3. 40/1 * 10/3 is 400/3 or 133 1/3 in simplest form. There are 133 1/3 doses of medicine in 3 1/3 bottles.
Answer:
The margin of error is given below:

Where:



Therefore, the option E = z*6% is correct as it closest to the given answer
Not sure its A but use this http://www.mathpapa.com/algebra-calculator.html
I do not know the answer to this question