(4%) Problem 28: A hot-air balloon rises from ground level, moving straight upward at a constant speed of 7.42 m/s. At 24.7 s after liftoff, a sandbag is accidentally dropped from the balloon. Neglect air resistance. 50% Part (a) How long, in seconds, does it take the sandbag to reach the ground from the moment it falls off the balloon? *= 6.91 - Correct! $ 50% Part (b) How fast is the sandbag moving, in m's, just before it hits the ground? Grade Summary V= 183.274 Deductions Potential 1009 sin() cos( tan() 7 9 HOME Submissions cotan( asing acos() 5 6 Attempts remaining 0% per attempt) atan() acotan( ) sinh( 2 2 detailed view coshQ tanh() cotanh() 0 END 1 O Degrees O Radians VO BACKSPACE DEL. CLEAR Submit Hint Feedback I give up! Hints: 0% deduction per hint. Hints remaining: 1 Feedback: 0% deduction per feedback