Solve the problem.A field microphone used at a soccer game has a parabolic cross section and is 20 inches wide at the opening. The focus is 9 inches from the vertex. Find the depth of the microphone.
A. 11.11 in.
B. 44.44 in.
C. 2.78 in.
D. 1.23 in.
Answer: C
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Identify equilibrium values and determine which are stable and which are unstable.
= (y + 2)(y + 1)
A. y = 2 is a stable equilibrium value and y = 1 is an unstable equilibrium. B. y = 1 is a stable equilibrium value and y = -2 is an unstable equilibrium. C. y = -2 is a stable equilibrium value and y = 1 is an unstable equilibrium. D. y = -1 is a stable equilibrium value and y = 2 is an unstable equilibrium.
Subtract.
- 
A. 
B. 
C. 
D. 
Write a word name for the given decimal notation.2.4
A. Two and four hundredth(s) B. Two and four millionth(s) C. Two and four tenth(s) D. Two and four thousandth(s)
Find the indicated intercept(s) of the graph of the function.y-intercept of f(x) = 
A. 
B. 
C. (0, 12)
D. none