Your sister is very sick and your doctor prescribed medicine. You need to give your sister 550mg of medicine every 8 hours for the next 3 weeks. The medicine is only sold in 225mg tablets. A bottle of 18 tablets cost k10.95. How many bottles of medicine should you buy to save your sister and how much will it cost.
To calculate the total dosage of medicine your sister needs over three weeks, we first need to determine how many times she needs to take it in a day. Since she needs to take the medicine every 8 hours, there are 24 hours divided by 8 hours, which equals 3 doses per day.
Next, we need to calculate the total number of days in three weeks. Since a week has 7 days, three weeks will have 3 * 7 = 21 days.
Therefore, the total number of doses your sister needs over three weeks is 3 doses/day * 21 days = 63 doses.
Now we need to calculate the total amount of medicine required in milligrams (mg) for these 63 doses. Each dose is 550mg, so the total amount needed is 550mg/dose * 63 doses = 34,650mg.
Given that each tablet contains 225mg, we need to calculate how many tablets your sister needs to reach a total of 34,650mg. So, dividing the total amount needed by the amount in each tablet: 34,650mg / 225mg = 154 tablets.
Since each bottle has 18 tablets, we divide the total number of tablets needed by the number of tablets in each bottle: 154 tablets / 18 tablets/bottle = 8.56 bottles.
Since you can't buy a fraction of a bottle, you would need to purchase 9 bottles to have enough medicine.
The total cost of 9 bottles at k10.95 each is 9 * k10.95 = k98.55.
Therefore, you should buy 9 bottles of medicine to save your sister, and it will cost k98.55.
To calculate how many bottles of medicine you should buy, we need to determine how many tablets your sister will need for three weeks and then divide that by the number of tablets in each bottle.
First, we need to calculate the total number of days in three weeks. Since there are 7 days in a week, three weeks will be 7 * 3 = 21 days.
Next, let's determine how many times your sister needs to take the medicine per day. Since she needs to take it every 8 hours, and there are 24 hours in a day, she will need to take it 24 / 8 = 3 times per day.
Now, let's calculate the total number of tablets your sister will need for three weeks. Multiply the number of tablets per dose (550 mg) by the number of doses per day (3) and then by the number of days (21):
550 mg/dose * 3 doses/day * 21 days = 34,650 mg
Since each tablet is 225 mg, divide the total amount of medicine needed by the amount in each tablet:
34,650 mg / 225 mg = 154 tablets
Now, let's calculate how many bottles you need to buy. Divide the total number of tablets needed by the number of tablets in each bottle:
154 tablets / 18 tablets per bottle ≈ 8.56 bottles
Since we can't buy a fraction of a bottle, you would need to buy 9 bottles to have enough tablets for three weeks.
Lastly, let's calculate the cost. Each bottle costs k10.95, so multiply the number of bottles needed (9) by the cost of each bottle:
9 bottles * k10.95/bottle = k98.55
Therefore, you should buy 9 bottles of medicine which would cost k98.55.