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21.03.2020 •
Mathematics
Determine the values of a, b, and c for the quadratic equation:
4x^2 – 8x - 3 = 0
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Ответ:
B value is: -8
C value is: -3
Ответ:
28.9 feet
Step-by-step explanation:
From the above question, we have obtained the following values:
Major axis of elliptical chamber = 30 feet
Note that length of the major axis of an elliptical chamber = 2a
Hence, 2a = 30
a = 30/2
a = 15 feet
Focus or foci = c = 4 feet
Length of the minor axis =2b = ??
The formula =
c² = a² - b²
b² = a² - c²
b²= 15² - 4²
b² = 225 - 16
b² = 209
b = √209
b = 14.456832295 feet
How far out from the center along he minor axis should he built his whisper chamber = Length of the minor axis
= 2 × b
= 2 × 14.456832295 feet
= 28.91366459 feet
Approximately = 28.9 feet