exam Maths Puzzle Numerical Ability

Evaluate the indicated function without finding an equation for the function.
g^-1 (7)

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exam Other Question

The circular cross section of a bar of chocolate has a radius of 2x cm and the triangular cross section of another chocolate bar has side lengths of
2x + 1 cm, 3x cm and 3x + 4 cm Science and medicine. It is estimated that 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?