Amodel jet is fired up in the air from a 20-foot platform with an initial upward velocity of 68 feet per second. the height of the jet above ground after t seconds is given by the equation , where h is the height of the jet in feet and t is the time in seconds since it is launched. what is the maximum height the jet reaches, to the nearest foot?

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap