Originally Posted by

**Coach**

Problem 1

Up to a certain height the temperature above sea level can be modelled by a linear function of height h in meters. At the height 500m the temperature is 15 degrees celsius, at a height of 10 000m the temperature is -80 degrees. Determine an equation for the relation between height and temperature.

Problem 2

The width of the canal is 10.0m and the greatest depth is 5m. The cross-section of the canal has the shape of a parabola.

How far from the bank is the depth 2.5m?

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