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21.03.2021 •
Mathematics
Three functions are given below: f(x), g(x), and h(x). Explain how to find the axis of symmetry for each function, and rank the functions based on their axis of symmetry (from smallest to largest).
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Ответ:
9514 1404 393
f, h, g
Step-by-step explanation:
The axis of symmetry for a vertically-opening parabola is the line ...
x = constant
where the constant is the x-coordinate of the vertex.
__
h(x)
The equation of f(x) is given in vertex form ...
f(x) = a(x -h)² +k . . . . . vertex: (h, k)
where (h, k) = (-4, 1).
The axis of symmetry of f(x) is x = -4.
__
g(x)
The equation of g(x) is given in standard form ...
g(x) = ax² +bx +c
The line of symmetry for this parabola is ...
x = -b/(2a) = -(-16)/(2(2)) = 16/4 = 4
The axis of symmetry of g(x) is x = 4.
__
h(x)
The x-coordinate of the vertex can be read from the graph:
x = 1
The axis of symmetry of h(x) is x = 1.
__
From smallest to largest, the rank is f(x), h(x), g(x).
Ответ:
$ 1,965,334
Step-by-step explanation:
Annual sales of company in 1999 = $ 1,200,000
Geometric mean growth rate = 10.37 % = 0.1037
In order to forecast we have to use the concept of Geometric sequence. The annual sales of company in 1999 constitute the first term of the sequence, so:
The growth rate is 10.37% more, this means compared to previous year the growth factor will be
r =1 + 0.1037 = 1.1037
We have to forecast the sales in 2004 which will be the 6th term of the sequence with 1999 being the first term. The general formula for n-th term of the sequence is given as:
So, for 6th term or the year 2004, the forecast will be:
Thus, the forecasted sales for 2004 are $ 1,965,334