1. Mark has $75 to spend on salmon at $5.00 per pound and/or chicken at $3.00 per pound. If he buys s pounds of salmon and c pounds of chicken, the equation 5s + 3c = 75 must be satisfied. How much salmon did Mark buy if he bought 10 pounds of chicken?
2. Using the formula to find Fahrenheit (F) in terms of Celsius (C), F = (9/5) C + 32, find the range (to the nearest tenth) of the Fahrenheit temperature when the range of the Celsius temperature is between 2°C and 10°C, inclusive.