Answer:
15,36,39
Step-by-step explanation:
A right triangle will satisfy Pythagoras Theorem:
c² = a² + b²; where c is the longest side.
Make a change of coordinates:


The Jacobian for this transformation is

and has a determinant of

Note that we need to use the Jacobian in the other direction; that is, we've computed

but we need the Jacobian determinant for the reverse transformation (from

to

. To do this, notice that

we need to take the reciprocal of the Jacobian above.
The integral then changes to

Answer:
The substance decays by 7.5% every year
Step-by-step explanation: