Answer:
13.14 litres
Step-by-step explanation:
The question is incomplete. Here is the complete question.
Dwight was told by his mystic guru that a special medicine would help him gain superhuman strength to fight bears. The instructions say “Take 2 drops per 10 pounds of body weight per day, in 4 doses a day.” Dwight weighs 180 lbs. There are approximately 20 drops in 1 mL. How many liters of the medicine should Dwight buy to have a supply for the next five years.
If Dwight takes 2 drops per 10 pounds of body weight per day and he weighs 180 pounds, the total drop per 180 pounds will be expressed as;
2drops = 10pounds
x drop = 180pounds
Cross multiply
10x = 360
Divide both sides by 10
10x/10 = 360/10
x = 36 drops
Therefore he uses 36drops per day (This is for one dose)
Since he is to take 4doses of it in a day, the total amount of drops he will take in a day will be 4×36 = 144drops/day
Before we can calculate the amount of litres he will need for the next 5years , we will have to know the total drops he will need for that 5 years first. This is shown below;
Converting 5years to days:
1year = 365days (excluding a leap year)
5years = 5×365 = 1,825 days
Since 1day = 144 drops
1,825 days = x drops
Cross multiply
x = 1825 × 144
x = 262,800 drops
This means that he will need 262,800 drops for 5years
If there are approximately 20 drops in a ml
262800 drops will be in (262800/20)ml
262800/20 = 13140mL
Convert 13140mL to litres
13140mL = 131400× 10^-3 Litres
13140mL = 13140/1000 litres
13140mL = 13.14Litres
Hence Dwight will have to buy 13.14litres of the medicine to have a supply for the next five years.