4. Recall the function p(x) = x? + 1. Write the zeros of the function The number i is a number such the imaginary identity. For this reason, The s - i is e number gh they mbers, al enough s very 3. If i? = -1, then what is the value of i? a + b comp numl The s form of im. num in terms of i. equal 20 Functions and equations that have solutions requiring i have imaginary zeros or imaginary roots. 5. How can you tell from the graph of a quadratic equation whetl or not it has real solutions or imaginary solutions? Rat ning, Inc.

2. The new cookbook you just got gives all the oven temperatures in degrees Celsius but your oven uses degrees Fahrenheit. Additionally, your oven runs hot and you always have to decrease the prescribed temperature by 15° F. Write an expression using a composition of functions that will determine how high you have to preheat your oven when a recipe from your new cookbook calls for a temperature of t° F. (Hint: C-(F-32) and F=C+32 are the equations to convert between degrees Celsius C and degrees Fahrenheit, F.)

2. Use the equation f(s) = 8s + 15 to evaluate the function at each value. Explain what each means in terms of the problem. a. f(7) b. f(100) c. f(11) d. f(0) e. f(2.5)

Use the following graph to obtain the graph of the function found by replacing cos with its reciprocal function. Give the equation of the function for the graph that you obtain. Ay W 0.6- 1 0.4- 0.2 y=cos 3xx 5 -0.2 -0.4 -0.6- F2 3 # 80 F3 $ 54 000 000 F4 2 % 205 F5 MacBook Air Λ V6 & 87 F7 y= (Typ num Cho OA OC. * 8 F8