A particle is moving on a straight line with an initial velocity of 10 ft/sec and an acceleration of not) : w + 2, where t is time in seconds and a.(t) is in ft/secz. What is its velocity after 9 seconds? 72 ft/sec 135 ft/sec 90 ft/sec 24 ft/sec 46 ft/sec 140 ft/sec Submit Answer Tries 0/99 000000