Exponents And Powers Test

Result

Exponents And Powers Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

The population of a specific country doubles itself after every 10 years. What would be the population of that country after 60 years?

A
2⁶ times the initial population

B
2⁸ times the initial population

C
2⁴ times the initial population

D
2¹⁰ times the initial population

Solution

Let the initial population be x.
Population after 10 years = 2x

Population after 20 years = 2(2x) = 4x = 2²x
Population after 30 years = 2(4x) = 8x = 2³x

Population after 40 years = 2(8x) = 16x = 2⁴x
Population after 50 years = 2(16x) = 32x = 2⁵x

Population after 60 years = 2(32x) = 64x = 2⁶x