Okay, so I've tried working this out but I keep coming across different formulas and it's getting really aggravating. I would really appreciate the help!

$56,500 at 11.5% compounded semiannually for 7 years. How much interest was earned each year?

This is the last time I've tried to solve it, so am I even close to the answer or what am I doing wrong??

Formula: A=P(1+r/n)^nt x 2

A = 56,500(1+0.115/2)^(7 x 2)
= 56,500(1.0575)^(7 x 2)
= 56,500(2.18739)
=12,3587.54

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

5 pm

step-by-step explanation:

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11