In the diagram above, O is the centre of the circle. If | \(\overline{OA}\) = 25 cm and |\(\overline{AB}\) = 40 cm, find |\(\overline{OH}\)|

A car valued at $ 600,000.00 depreciates by 10% each year. What will be the value of the car at the end of two years? 

Given that P is 25 m on a bearing of 330º from Q, how far south of P is Q?

The length and breadth of a cuboid are 15 cm and 8 cm respectively. If the volume of the cuboid is 1560 cm\(^3\), calculate the total surface area.

The number 1621 was subtracted from 6244 in base x. If the result was 4323, find x.