According to inventory records at a shoe store, the number of pairs of sandals (in hundreds) in stock can be approximated by S(x) = 9x + 185 x + 4 . where x is the number of days since the start of the season. For the given times, find the number of pairs of sandals in stock and the rate at which sandals are being sold. (a) The start of the season (b) Sixty days after the start of the season (a) Find S'(x) S'(x) = The number of pairs of sandals at the start of the season is pairs. The rate at which sandals are being sold at the start of the season is pairs per day (Round to the nearest whole number as needed.) (b) The number of pairs of sandals sixty days after the start of the season is pairs. The rate at which sandals are being sold sixty days after the start of the season is pairs per day. (Round to the nearest whole number as needed.)