Find the values of the 30th and 90th percentiles of the data. 129, 113, 200, 100, 105, 132, 100, 176, 146, 152
a. 30th percentile = 105; 90th percentile = 200
b. 30th percentile = 113; 90th percentile = 200
c. 30th percentile = 105; 90th percentile = 176
d. 30th percentile = 113; 90th percentile = 176

note: i answered c and got it wrong.

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

i'm not entirely sure

step-by-step explanation:

if you ask home depot or lowe's they might be able to you out