Question 69998
1. I think you must have missed something in this problem.
p = 0.3688+43.99 Where's the variable?
p = 44.3588 In this equation, p is a constant so it is not a function at all!

2. b = 83.9+106.3 Again, where's the variable?
b = 190.2 Here again, b is a constant.  The rate of change of a constant is zero.
Check the original problem for the missing variables!