"the formula needed to solve this problem is:" h_(peak)=(v_i^2*sin^2 theta/(2*g)) v_i=3 m/s theta =180/cancel(pi)*cancel(pi)/8 theta =180/8 sin theta=0,13917310096 sin^2 theta=0,0193691520308 h_(peak)=3^2*(0,0193691520308)/(2*9,81) h_(peak)=9*(0,0193691520308)/(19,62) h_(peak)=0,00888"meters"