13. [0/1 Points] DETAILS PREVIOUS ANSWERS TANAPCALC10 3.6.040. MY NOTES ASK YOUR TEACHER Distance Between Two Cars A car leaves an intersection traveling west. Its position 4 sec later is 21 ft from the intersection. At the same time, another car leaves the same intersection heading north so that its position 4 sec later is 27 ft from the intersection. If the speeds of the cars at that instant of time are 7 ft/sec and 14 ft/sec, respectively, find the rate at which th distance between the two cars is changing. (Round your answer to one decimal place.) 15.4 X ft/s 14. [0/1 Points] DETAILS PREVIOUS ANSWERS TANAPCALC10 3.6.042. MY NOTES ASK YOUR TEACHER Effect of Price on Supply of Tires Suppose the quantity x of Super Titan radial tires made available each week in the marketplace is related to the unit-selling price by the following equation where x is measured in units of a thousand and p is in dollars. p - x2 = 48 How fast is the weekly supply of Super Titan radial tires being introduced into the marketplace when x = 9, p = 88.5, and the price/tire is decreasing at the rate of $6/week? (Round your answer to the nearest whole number.) 666 X tires/week