The nurse is applying the four rules of using rations and ...

[yoroshambo]

The nurse is applying the four rules of using rations and proportions to calculate medication dosages for clients. Which of the following accurately describes one of these rules?
 
  A) The product of the means is greater than the product of the extremes.
  B) The product of the means multiplied by one extreme yields the other extreme.
  C) The product of the extremes divided by one mean yields the other mean.
  D) Whatever is done on one side of the equals sign is two times less than the other side.

Question 2

To convert medication dosages from one quantity to another, the nurse must know how to use ratio and proportion. Which of the following is true about the ratio 2:4 :: 1:2.
 
  A) This represents two unequal ratios separated by a double colon.
  B) The numbers 4 and 2 are referred to as the extremes.
  C) The numbers 2 and 2 are referred to as the means.
  D) The proportion is referred to as a valuable relationship.

Question 3

The nurse is reviewing with a group of student nurses about the use of ice bags. What is the best response by a student nurse about the uses for an ice bag?
 
  1 . Headache
   2 . Sprain
   3 . Nosebleed
   4 . Concussion
  A) 1, 2, 3
  B) 1, 2, 4
  C) 1, 3, 4
  D) 2, 3, 4

[juwms]

Answer to Question 1

C
Feedback:
The four rules that apply when using ratios and proportions are as follows: (1) The product of the means equals the product of the extremes; (2) The product of the means divided by one extreme yields the other extreme; (3) The product of the extremes divided by one mean yields the other mean; and (4) Whatever is done on one side of the equals sign must be done on the other side as well.

Answer to Question 2

D
Feedback:
This is a valuable relationship. When written with the double colon, the first and last numbers are referred to as the extremes and the second and third (middle) numbers are the means. A true proportion consists of two equal ratios separated by an equals sign (=) or a double colon (.

Answer to Question 3

A
Feedback:
An ice bag is often used for a headache or in an emergency, such as a sprain or nosebleed, not a concussion.

[yoroshambo]

Excellent

[elyse44]

Wow, this really help