The height, h , in feet of the tip of the minute hand of a wall clock as a function of time, t , in minutes can be modeled by the equation h is equal to 0 point 7 5 cosine open paren pi over 30 times open paren t minus 15 close paren close paren plus 8 Which number (from 1 to 12 ) is the minute hand pointing to at t is equal to 0 ?