Find the standard deviation.A realtor wanted to determine the number of homes on the market in her area for the past ten months. The number of homes for sale at the end of each month are represented by following data. Find the standard deviation for the data. Round your answer to one decimal place. 48 50 52 58 61 33 34 39 46 51
A. 9.4 homes
B. 50.1 homes
C. 88.6 homes
D. 8.9 homes
Answer: A
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Factor completely.80x2 - 45
A. 5(4x + 3)2 B. (4x - 3)(20x + 15) C. 5(4x - 3)(4x + 3) D. (20x - 15)(4x + 3)
Graph the quadratic function. Determine the vertex, find the equation of the axis of symmetry, find any x- and y-intercepts, and state the domain and range in interval notation.f(x) = x2 - 12x + 36
A. vertex: (6, 36)
axis of symmetry: x = 6
x-intercept: none; y-intercept: 72
domain: (-?, ?); range: [36, ?)
B. vertex: (-6, 0)
axis of symmetry: x = -6
x-intercept: -6; y-intercept: 36
domain: (-?, ?); range: [0, ?)
C. vertex: (6, 0)
axis of symmetry: x = 6
x-intercept: 6; y-intercept: 36
domain: (-?, ?); range: [0, ?)
D. vertex: (-6, 36)
axis of symmetry: x = -6
x-intercept: none; y-intercept: 72
domain: (-?, ?); range: [36, ?)
If f satisfies the equation of change 
, and the initial value of f is 4.3, find a formula for the function 
.
?
A. 
B. 
C. 
D. 
The weight of a certain type of fish is a power function of its length. The value of the power in this function is 
. If the length is multiplied by 1.28, how the is weight affected? Round your answer to two decimal places if necessary.
?
A. Weight is multiplied by 1.12. B. Weight is multiplied by 1.31. C. Weight is multiplied by 2.22. D. Weight is multiplied by 1.73.