I guess by length you mean diameter.
so the radius is 25 cm
Since the parabola will be a simple
y = ax^2
You just need to find a such that
a*25^2 = 15
A qulliq [kudlik] is an oil lamp that functions as the main source of heat and light for an igloo in the Inuit culture. It is made of soapstone shaped as a parabolic bowl that contains seal blubber for the oil. It is lined with arctic wool for the wick. If the length of the bowl is 50cm and the height is 15cm, determine the quadratic function that can be used to model the shape of a qulliq.
When the function is written in vertex form, y = a(x - h)2 + k. The values of the parameters a, h and k are as follows:
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