exam Maths Puzzle Numerical Ability

Write the equation log(243) 81=4/5 in exponential form.

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exam Other Question

in 1990,the life expectancy in males in a certain country was 63.1 years.in 1996 it was 65.4 years.let E represent the life expectancy in year t and let t represent the numbers si is 2 greater than or equal to 1/2y-1/4y