SOLVE STEP BY STEP IN DIGITAL FORMAT 4. The graph of f is given. Use it to graph the following functions. a) y = f(2x) c) y = f(-x) Aumente la cuadricula de ser necesario. 1 0 b) y = f(x) d) y = -f(-x) 1 x

One model for expenditures at high school gives the cosr C, in dollars per pupil, as a function of the number n of students enrolled. The relationship is C= 725 - 0.4 n + 0.00012n^2 A) find the cost that corresponds to the minimum cost per pupil B) find the enrollment that corresponds to the minimum cost per pupil

Determine whether the equation or table defines y as a function of x y + 1/y = x + 1/x

During Ricardo noticed an ink stain with a diameter of about 3 cm on the front of his teacher’s shirt. He then noticed that there was a pen in the pocket and that the ink blot was continuing to spread across the front of the teacher’s shirt. He estimated that the diameter of the ink blot seemed to be growing by about 0.5 cm every 2 minutes. a) Write an equation for the RADIUS, r, of the ink stain, as a function of time, t. Assume that t = 0 represents the time that Ricardo first noticed the ink stain. b) Write an equation showing the AREA, A, of the ink stain as a function of the time t. (Hint: It might help to first write A as a function of r. ) c) Draw a graph of the function A(t) for 10 minutes. d) At what time is the area of the ink stain about 25 square centimeter? Show how you answer this question. (i.e. ”I found it using desmos” is not sufficient)