Scientists have detected an asteroid that is 700,000,000 km from earth. about how many astronomical units is that? 0.5 au 1 au 3.5 au 4.5 au

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.