2. Parentheses often need to be used with technology to clearly communicate the desired calculation. Depending on your device, you may need to add parentheses in order for it to perform the correct calculation. The most common necessity of parentheses occurs in: Exponents - the bottom number (base) and/or the top number (exponent) Square roots of numbers Fractions - the bottom number (denominator) and/or the top number (numerator) Multiplying by negative numbers Note: Some devices will automatically include parentheses on some of these problems. On these problems so you may arrive at the correct answer without including any additional parentheses. Each of the following problems have their correct answers provided to the right. Show where parentheses need to included on your device in order for it to get each correct result. (a) 23T Correct Answer: 687.2913 Correct Answer: 1.3632 | Correct Answer: 2.4145 TT+1 (): 2-V10 Correct Answer: -11.7379 (p) V26-5 Correct Answer: 16 (e) The value of x2 when x = -4 Correct Answer: -10 (f) The value of 5x when x = -2 Correct Answer: 5 (g) 251/2 64 Group problems: 1. (a) Use technology to create a graph of y = 5000 – 240x %3D Note: since this problem provides no instructions or guidance for how to label and scale the axes you should follow the 3 step process outlined in Class Discussion problem 3(b). Once you have created a good graph, recreate a simple sketch below and be sure to specify the smallest and largest x-values and y-values. (b) On graphing calculators you will often find a TRACE feature that puts a cursor on the displayed graph and allows you to scroll right and left using the arrow keys. On a computer application you can usually use a mouse or location selector to put a curson on the displayed graph. Using the graph displayed on your device, locate the x-intercept. If you cannot find the exact value of the x-intercept then try to get a good approximation. Record the coordinates of the x-intercept you found: (c) Using the graph displayed on your device, locate the y-intercept. If you cannot find the exact value of the y-intercept then try to get a good approximation. Record the coordinates of the y-intercept you found: 63