If a and b are fixed numbers, find parametric equations for the set of all points P determined as shown in the figure, using the angle ang ang as the parameter. Write the equations for a = 12 and b = 4.
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Mathematics
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Write the following proportion.$66 is to $77 as $78 is to $91
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Mathematics
Solve the equation. Express radicals in simplest form.4x2 + 4x + 4 = 0
A. 
B. ?
C. 
D. {5, 4}
Mathematics
Solve the problem.The loudness of a sound is measured in decibels (dB). The loudness L of a sound is related to its intensity I by the equation 
where I0 = 10-12 watts per square meter (W/m2) is the intensity of the faintest sound the human ear can detect. Find the intensity of a 45 dB sound.
A. I = 10-7.5 W/m2 B. I = -7.510 W/m2 C. I = 10438 W/m2 D. I = 1016.5 W/m2
Mathematics
Give the ordered pairs for the points labeled on the graph.
A. A(-2, 2); B(6, -3) B. A(-2, 0); B(-6, -3) C. A(2, 0); B(6, -3) D. A(-2, 0); B(6, -3)
Mathematics