(B) To find the maximum height of the rocket described by the function h(t)=−16t2+80t+10, find the vertex of the parabola by completing the square:h(t)​=−16(t2−5t+425​)+10+(16)(425​)=−16(t−25​)2+110​The maximum value of the function is 110 , which is the y-coordinate of the vertex.