The death rate from measles is 0.15%.In 2015, 134 250 people died from measles.Calculate the number of people infected with measles in 2015.Give your answer in standard form
Question
The death rate from measles is 0.15%.In 2015, 134 250 people died from measles.Calculate the number of people infected with measles in 2015.Give your answer in standard form
Solution
To calculate the number of people infected with measles in 2015, we need to understand that the death rate is the proportion of people infected who die from the disease.
Step 1: Understand the problem The death rate from measles is 0.15%, which means that 0.15% of people infected with measles die from it. In 2015, 134,250 people died from measles. We need to find out how many people were infected in total.
Step 2: Convert the percentage to a decimal 0.15% is the same as 0.0015 in decimal form.
Step 3: Set up the equation If 0.0015 (the death rate) of the total number of people infected equals 134,250 (the number of people who died), we can set up the following equation to find the total number of people infected (which we'll call X):
0.0015X = 134,250
Step 4: Solve for X To solve for X, we need to divide both sides of the equation by 0.0015:
X = 134,250 / 0.0015
Step 5: Calculate X X = 89,500,000
So, approximately 89,500,000 people were infected with measles in 2015.
In standard form, this is written as 8.95 x 10^7.
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