Need help with an exponential formula. Given the following statement with the min and max values...min:{ A: 200, B: 2400 } max:{ A: 2500 B: 75 }How do I calculated the value of B, with a specifc value of A ( between 200 and 2500 ). So to summarise with an example, if B = 1459, what formula can I use to get the value of A?

A pyramid stands on horizontal ground. It's base is an equilateral triangle with sides of length a, the other three edges of the pyramid are of length b and volume is V. Show that the volume is V =1∕12 a²√(3b²-a²)