In 2007 the population of the world was 6 000 000 000A study found that 4.5% of the population had severe water shortage.Calculate how many people had severe water shortage.Give your answer in standard form.[3 marks]Number of people (in standard form) =Question 5 continues on the next page
Question
In 2007 the population of the world was 6 000 000 000A study found that 4.5% of the population had severe water shortage.Calculate how many people had severe water shortage.Give your answer in standard form.[3 marks]Number of people (in standard form) =Question 5 continues on the next page
Solution
To calculate the number of people who had severe water shortage, you need to find 4.5% of the world's population in 2007.
Step 1: Convert the percentage to a decimal. 4.5% becomes 0.045.
Step 2: Multiply the world's population by the decimal.
6,000,000,000 * 0.045 = 270,000,000
So, 270 million people had a severe water shortage in 2007.
In standard form, this is written as 2.7 x 10^8.
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