72. Sammy and Luis each threw a ball into the air at the same time. The height, in feet, of Sammy's
ball after t seconds is modeled by the expression
2 + 40+ – 16t2. The height, in feet, of Luis's ball
after t seconds is modeled by the expression
2 + 35t - 16t2. Which expression can be
evaluated to find how much higher Sammy's
ball is than Luis's ball after t seconds?

A 5t
B.5t +4
C 75t + 4
D -3212 + 75t + 4

First locate the turning point (vertex) of the graph. which is at the coordinates x=5 and y=9 or (5; 9).to determine whether it's a maximum or mininum value, you have to discern whether the vertex's y-value is the highest value or lowest value the graph can reach. since the vertex's y-value, 9 is the highest value the graph can reach, it will be a maximum.another basic way to determine whether the vertex's value is max or min is to see if the graph is smiling or sad. if it's smiling, the turning point/vertex would be a minimum, while a sad parabola would have a maximum y-value at the vertex.

Use a