exam Maths Puzzle Numerical Ability

After a storm, 25% of the population of Camden lost electricity. If the population of Camden is 75,286, approximately how many people lost electricity?

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exam Other Question

A population grows at a rate of 8% per year forever. The population starts at 100. What is the size of the population at the end of year n? ( for any integer n) How would I solve this using quadratic formula?

f(x) = x^2 + 4