So hmmm check the graph below
now.. to find the vertex of any quadratic

so... how long did it take? well, it took

what was the highest point? well, it was

when did he hit the water? well, at y = 0
that is

solve for "t"
The calculations are incorrect because the angles in a parallelogram are either:
The same
or complimentary (add up to 180)
Neither case is true here so the calculations are incorrect.
The slope of a line is always zero because the line does not move up or down on the y-axis.
Answer:
2.8 or 2.77777
Step-by-step explanation:
9 can go into 25 less than 3 times but more than 2