exam Maths Puzzle Numerical Ability

Solve the following equation for x.

185.45=32.1e^1.23x

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exam Other Question

7+3x=5x-5 If a crew of 8 can row a boat 20k/hr in still water. The river flows 2K/hr. If they row the boat up stream and return in 15min.how far up stream did they go?