Answer:
Step-by-step explanation:
P(x)=S(x)-C(x)
0.8=9-C(x)
C(x)=9 -0.08
C(x)=8.92
In the northern hemisphere a south-facing slope (more open to sunlight and warm winds) will generally be warmer and drier due to higher levels of evaporation and transpiration than a north-facing slope. So South facing slopes are much warmer.
Answer: $120
Step-by-step explanation: 30% off of 120 is 84