Answer:
90.8 m
Step-by-step explanation:
Pythagorean Theorem
A²+B²=C²
slant height = C
A = 19.6/2=9.8m
90.9 in to m = 2.3m
9.8²+B²=2.3²
B²=90.9²-2.3² = 8257.52
B=
= 90.8
Answer:c
Step-by-step explanation:
Check the picture below
so.. .hmmm the vertex is at the origin... and we know the parabola passes through those two points... let's use either.. say hmmm 100,-50, to get the coefficient "a"
keep in mind that, the parabolic dome is vertical, thus we use the y = a(x-h)²+k version for parabolas, which is a vertical parabola
as opposed to x = (y-k)²+h, anyway, let's find "a"

now.. .your choices, show.... a constant on the end.... a constant at the end, is just a vertical shift from the parent equation, the equation we've got above.. is just the parent equation, since we used the origin as the vertex, it has a vertical shift of 0, and thus no constant, but is basically, the same parabola, the one in the choices is just a shifted version, is all.
When a line passes through the two points
, its slope is given by the formula 
In this question, a line L passes through the points 
So, its slope is given by

When two lines are perpendicular, then the product of their slopes is -1.
Since, the slope of the line L is
, so the slope of the line which is perpendicular to the given line L is
as the product of
.