exam Maths Puzzle Numerical Ability

it is estimated the earth is losing 4000 species of plants and animals every year. if s represents the number of species living last year how many species are on earth this year?

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2√3+3√5-4√5 A sphere and a cone have the same radius. The volume of the cone equals the surface area of the sphere. If both of those statements are true, what would the height of the cone have to be.