Solve the problem.There are currently 51 million cars in a certain country, decreasing by 2.3% annually. How many years will it take for this country to have 21 million cars? Round to the nearest year.
A. 13 yr
B. 148 yr
C. 3 yr
D. 39 yr
Answer: D
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Graph the function by starting with the graph of the basic function and then using the techniques of shifting, compressing, stretching, and/or reflecting.f(x) = -|x|
A. 
B. 
C. 
D. 
Multiply.(0.8x - 0.2)2
A. 0.64x2 + 0.32x + 0.04 B. 0.64x2 - 0.32x + 0.04 C. 0.64x2 + 0.04 D. 0.64x2 + 0.32x - 0.04
Write the expression as the cosine of an angle, knowing that the expression is the right side of the formula for 
with particular values for ? and ?.cos 
cos 
+ sin 
sin 
A. cos 
B. cos 
C. cos 
D. cos 
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 - 8x
A. vertex: (-4, 16)
axis of symmetry: x = -4
x-intercepts: 0 and -8; y-intercept: 0
domain: (-?, ?); range: (-?, 16]
B. vertex: (4, -16)
axis of symmetry: x = 4
x-intercept: none; y-intercept: -32
domain: (-?, ?); range: (-?, -16]
C. vertex: (-4, -16)
axis of symmetry: x = -4
x-intercept: none; y-intercept: -32
domain: (-?, ?); range: (-?, -16]
D. vertex: (4, 16)
axis of symmetry: x = 4
x-intercepts: 0 and 8; y-intercept: 0
domain: (-?, ?); range: (-?, 16]