(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. A 50% Part (a) How long, in seconds, does it take the sandbag to reach the ground from the moment it falls off the balloon? Grade Summary I = Deductions Potential 100% sing cos tan() 7 8 HOME Submissions cotan( asin( acos() 4 5 6 + Attempts remaining: 5 (0% per attempt) atan() acotan() sinh( 1 2 3 detailed view cosh( tanh() cotanh() + 0 END 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. 50% Part (b) How fast is the sandbag moving, in m's, just before it hits the ground