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A medication bottle initially contains 300 ml of medicine. Each day, 10 ml are used. Let [tex] h [/tex] be the number of days the medication has been used.

Which equation can be used to determine the number of days it takes for the bottle to contain 220 ml of medicine?

A. [tex] 300 h - 10 = 220 [/tex]
B. [tex] 220 h + 10 = 300 [/tex]
C. [tex] 220 - 10 h = 300 [/tex]
D. [tex] 300 - 10 h = 220 [/tex]

Answer :

To determine the number of days it takes for the medication bottle to contain 220 ml of medicine, we need to set up an equation that represents the situation described in the problem.

Initially, the bottle contains 300 ml of medicine. Each day, 10 ml are used. Let [tex]\( h \)[/tex] be the number of days the medicine has been used. After [tex]\( h \)[/tex] days, the amount of medicine remaining in the bottle will be:

[tex]\[ 300 - 10h \][/tex]

We want to find out when the amount of medicine left in the bottle is 220 ml. Thus, the equation we need is:

[tex]\[ 300 - 10h = 220 \][/tex]

So, the correct equation is:

[tex]\[ \boxed{300 - 10h = 220} \][/tex]

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