A boy drops his toy jet out of the window of his apartment. How high is his window if it hit the ground 4.0 seconds later? (for units answer please do not write out the full word - use units only)

answer is c

explanation:

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.