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Mathematics, 28.10.2020 15:10 hardyfombu

Question 2: The value of a motorcycle was £14000 on 1st April 2014. Every three months the value of the motorcycle decreases by 2% of its value at
the start of that three months.
What was the value of the motorcycle on 1st April 2016?
Question 3: When a ball is dropped, it bounces and then rises.
The ball rises to 90% of the height from which it is dropped.
The ball is dropped from a height of 4m.
(a) Calculate the height of the rise after the first bounce.
(b) Calculate the height of the rise after the second bounce.
The ball carries on bouncing, each time rising to 90% of the last rise.
(C) For how many bounces does it rise to height greater than 1m?
Question 4: The population of a country is increasing by 5% a year.
How many years will it take the population of the country to double?
Question 5: Raheem and Ben invest money in 2010.
Raheem invests £1000 at Banks'R'us, who pay 3% interest per year.
Ben invests £1400 at Bank World, who pay 1% interest per year
In which year will Raheem's investment be worth more than Ben's?
Question 6: The population of a country increases by x% each year.
In 2014 the population of the country was 24,000,000.
Three years later, the population was 26,996,736.
Find x.
Question 7: Charlotte invests £5000.
The bank pays 10% interest for the first year and then y% every year after that.
After three years, Charlotte has £5610.55
Calculate y.

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