Question: 1. Consider the function J (? ) = x2-9 a. [3 pts] For what values of ? does f (?) = 0 ? b. [3

1. Consider the function J (? ) = x2-9 a. [3 pts] For what values of ? does f (?) = 0 ? b. [3 pts] What is the domain of f(?) ? Express your answer in interval notation 2. On two separate occasions , Mr . Fishman needed electrical work done on his house . He called Miss Kito for help as she runs Miss Kito's Electrical Outlet in town . The first visit , Miss Kito worked 2.5 hours and charged $175 . The second time she worked 4 hours and charged $235. Let ? be the number of hours Miss Kito works in a single visit , and let ? be the total amount , in dollars , that Miss Kito charged for the visit a) [4 pts] Create the equation that relates the total cost to the time worked. Note : This will be a linear relationship , so start by finding the slope of the line based on the given information Express the final equation in ? = m? + b form . b) [2 pts] How much would Miss Kito charge for 6 hours of work ? Include units

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