Lab – Math 95 - Calculator Use David Lippman – F05 Name: ________________________ Part 1 – Basic Calculations If you entered “ 3 10 2 ” on a basic calculator, you’d probably get 66 as the answer. On a scientific calculator, you might get 66 or you might get 23. 1. What is the correct answer to 3 10 2 ? 2. Try entering 3 10 2 on your graphing calculator. What answer do you get? 54 . What would be wrong with entering “ 5 4 / 2 1 ” 2 1 on your calculator? How could you change this so it evaluates correctly? 3. Suppose you needed to evaluate 4. Evaluate 3 4 1 5. Evaluate 2 5 6. If f ( x) x 2 , then f (3) 9 . What’s wrong with entering “-3^2” on your calculator to do this evaluation? How could you change this so it evaluates correctly? Part 2. Tables 7. Create a table for the function f ( x) x 2 2 , starting at x = 3, and with an increment of 2. List the first three entries of the table. 8. Suppose you are planning on replacing the carpet in your bedroom. The carpet costs $3.15 per square foot. a) Write a function that gives the total cost c as a function of the area a (in square feet) of the room. b) What would be a reasonable practical domain for this function? c) Create a short table of values for this function, choosing an appropriate start an increment based on the practical domain. Part 3 – Graphing For each of these problems, list your window and give a quick sketch of the graph. 9. Graph the function f ( x) x 2 2 10. Graph the function f ( x) 2 x 40 . Set the window to get a good view of the function. 11. Graph the function from problem 8, setting the window based on your practical domain.