an analgesic is ordered for intramuscular injection. if the concentration of analgesic available is 8 mg/ml, how many ml should be administered for a dosage of 20 mg?
a. 2.0
c. 3.0
b. 2.5
d. 3.5

2.5 ml for a dosage of 20 mg.

Step-by-step explanation:

Hello, great question. These types are questions are the beginning steps for learning more advanced Ratio problems.

Since this is basically a ratio problem we can use the simple Rule of Three property to solve this problem. The Rule of Three property can be seen in the photo below. Now we just plug in the values and solve for x.

 8 mg.   ⇒   1 ml.

20 mg.   ⇒   x

Now we can see that we should administer a 2.5 ml for a dosage of 20 mg.

I hope this answered your question. If you have any more questions feel free to ask away at .

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you