While you got it working, you are over complicating the process.
First you defined that variables, that's fine
(define tax-rate .15)
(define pay-rate 12)
The function net-pay only needs one input, the amount of hours you are working.
With the defined pay-rate and tax-rate, how would you determine net-pay of 10
hours by hand?
I hope you would multiply pay-rate by hours to produce gross pay
(12 * 10)=120, so 120 is the gross pay.
Now how would you find the net pay of the gross pay? You could either subtract
.15 from 1, or subtract gross pay*.15 from gross pay.
120*.85= 102, or 120-120*.15 =102.
While auxiliary functions are a great thing to understand you don't quite need
them for such a small function, you can even define the function with out
defining variables.
The solution you came up with just seems confusing when I look at it.
You defined gross-pay as
(define(gross-pay h)
(* h pay-rate))
You are using gross in net-pay as an argument which isn't really something you
need to do right now.
Everytime you want to check a number you need to type (netpay(gross x)taxrate)
why not just develop it so you can type (net-pay x) and have it produce the
net-pay?
Try doing it without using an auxiliary function and the ONLY argument as h
(define(netpay h)
(tax-rate payrate h..)
Those should be the only things used in your program.
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