Instructions: Attempts all problems. Full marks will only be awarded where full working is shown or explanation given. 1. A producer of educational DVDs is producing an instructional DVD. She estimates that it will cost $90,000 to record the DVD and $5.10 per unit to copy and distribute the DVD. If the wholesale price of the DVD is $14.70, how many DVDs must be sold for the producer to break even? [4 pts] 2. At sea level, the weight of the atmosphere exerts a pressure of 14.7 pounds per square inch, commonly referred to as 1 atmosphere of pressure. As an object descends in water, pressure P and depth d are linearly related. In salt water, the pressure at a depth of 33 ft i1s 2 atms, or 29.4 pounds per square inch. [3 pts each] 1) Find a linear model that relates pressure P (in pounds per square inch) to depth d (in feet). 11) Graph the linear model obtained in (1) i11) Interpret the slope of the model. 1v) Find the pressure at a depth of 50 ft. v) Find the depth at which the pressure is 4 atms. 3. An all-day parking meter takes only dimes and quarters. If it contains 100 coins with a total value of $14.50, how many of each type of coin are in the meter? [4 pts] 4. Solve [3 pts] 5. Solve [3 pts] 6. Solve [3 pts]