Use interval notation to write the intervals over whichfis (a) increasing, (b) decreasing, and (c) constant. .- =1. n__ Part 1 of 3 'jjjz- \"he function is never increasing. I l ' } 00 -00 C:- "he function is sometimes increasing. Increasing interval: D U EI'Iz- "he function is always increasing. X 53 Increasing interval: |:| Increasing interval: Part 2 of 3 O The function is never decreasing. (0,0) - 00 O The function is sometimes decreasing. OVO Decreasing interval: X 5 O The function is always decreasing. Decreasing interval: Part 3 of 3 O The function is never constant. (0,0) 00 - OO O The function is sometimes constant. OVO Constant interval: X O The function is always constant. Constant interval:Identify the location and value of anilr relative maxima or minima of the function. "r Part: D I 2 Part 1 of 2 ."he function has no relative minimum. ( , } ..---i -::j:- "he function has one relative minimum. X f) -: .:- "he function has two relative minima. A relative minimum occurs at the point(s) ' '. A law office orders business stationery. The cost is $20.55 per box. (a) Write a function that represents the cost C(x) (in $) forx boxes of stationery. (b) There is a 5% sales tax on the cost of merchandise and $9.68 for shipping. Write a function that represents the total cost T(a) for a dollars spent in merchandise and shipping. (c) Find (T o C)(I). (d) Find (T 0 CH3) and interpret its meaning in the context of this problem. Part: of 4 Part 1 of4