1 mL = 32 drops from a dropper. If a 15 mL container holds 60 equal doses of medicine, how many drops are in a dose?
1 Answer
Explanation:
The problem tells you that every milliliter of the container is equivalent to
You can calculate the number of drops present in the container by keeping in mind that the milliliters to drops ratio must be constant
#"no. of milliliters"/"number of drops" = "constant" = 1/32#
If you take
#"1 mL"/"32 drops" = "constant" = "15 mL"/x#
This means that you have
#x = ("32 drops" xx 15 color(red)(cancel(color(black)("mL"))))/(1color(red)(cancel(color(black)("mL")))) = "480 drops"#
Now all you have to do is use the fact that the container holds
#"60 doses"/"480 drops" = "1 dose"/y#
You will have
#y = ("480 drops" xx 1 color(red)(cancel(color(black)("dose"))))/(60color(red)(cancel(color(black)("doses")))) = "8 drops"#
Therefore, you need