exam Maths Puzzle Numerical Ability

The loudness of sound is based on intensity level measured in decibels using a logarithmic scale and is relative to (a ratio of) the weakest sound the ear can hear.

The formula

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exam Other Question

A sequence in which the ratio of successive terms is a constant r, called the common ratio is a(n) ____________ sequence. Add. Simplify if possible.

2 + 1
over
9t to the third power 6t to the second power