Answer:
Step-by-step explanation:
f(x)=42-0.45(x) Solution 13.5 dollars expend in 30 Finishing nails
f(x)=42-0.60(x) Solution 18 dollars expend in 30 Common nails
They can both be correct because if 0 is the turning point their answers are the same
In decimal form the answer is 20.34375
The answer to your question is 67.2 but logically a human cant be divded so the answer is 67.
