When should I use double instead of decimal?

Question

I can name three advantages to using double (or float) instead of decimal:

1. Uses less memory.
2. Faster because flo

Answer 1

Decimal has wider bytes, double is natively supported by CPU. Decimal is base-10, so a decimal-to-double conversion is happening while a decimal is computed.

For accounting - decimal
For finance - double
For heavy computation - double

Keep in mind .NET CLR only supports Math.Pow(double,double). Decimal is not supported.

.NET Framework 4

[SecuritySafeCritical]
public static extern double Pow(double x, double y);