The revenue from the sale of x ultra-absorbent shammies is given by R(x) = 42+ - 0.3x2 dollars. The total cost is given by C(x) = 0.1x2 - 2x + 450 dollars, where 0 SXS 90. Determine the interval of sales for which the profit is increasing and the interval for which it is decreasing. Express your answer in open intervals, The revenue from the sale of x ultra-absorbent shammies is given by R(x) = 42% - 0.3x dollars. The total cost is given by C(x) = 0.1x? - 2x + 450 dollars, where 0 SX 390. Determine the interval of sales for which the profit is increasing and the interval for which it is decreasing Express your answer in open intervals