40. A scientist dropped an object from a height of 200
feet. She recorded the height of the object in 0.5
second intervals. Based on a quadratic model, which
best approximates the height at 3 seconds?
Height (ft)
200
A. 52 feet
Time (s)
0.0
0.5
1.0
B. 55 feet
195
C. 65 feet
185
1.5
165
D. 80 feet
2.0
135
2.5
100
41
2+2=?

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

true

step-by-step explanation:

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.

98%

step-by-step explanation: