Solve the problem.A satellite dish is in the shape of a parabolic surface. Signals coming from a satellite strike the surface of the dish and are reflected to the focus, where the receiver is located. The satellite dish shown has a diameter of 12 feet and a depth of 7 feet. The parabola is positioned in a rectangular coordinate system with its vertex at the origin. The receiver should be placed at the focus 
The value of p is given by the equation 
How far from the base of the dish should the receiver be placed?
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A. 5
feet from the base
B. 
feet from the base
C. 1
feet from the base
D. 
feet from the base
Answer: C
Mathematics
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A. 5 feet from the base
B. feet from the base
C. 1 feet from the base
D. feet from the base
Answer: C
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Solve the equation by first clearing the fractions.- 
r + 2r = 
r + 
A. {0}
B. {18}
C. 
D. 
Find the perimeter.A lot has sides measuring 5
, 5
, 3
, and 4
yards.
A. (104 + 20
) yards
B. (72
) yards
C. (52 + 20
) yards
D. (52
+ 20
) yards
Solve the problem.Use the formula D = 10.0 log(S/S0), where the loudness of a sound in decibels is determined by S, the number of watt/m2 produced by the soundwave, and S0 = 1.00 × 10-12 watt/m2. What is the intensity in watt/m2 of a noise measured at 40 decibels? (Round to the nearest tenth.)
A. 4 × 10-10 watt/m2 B. 1.0 × 10-7 watt/m2 C. 1.0 × 10-8 watt/m2 D. 5.5 × 1013 watt/m2
Use the laws of exponents to simplify. Write the answer with positive exponents.
A. 111/2
B. 
C. 2
D. 121