Mathematics, 05.05.2020 05:17 Krch1401
The reflecting dish of a parabolic microphone has a cross-section in the shape of a parabola. The microphone itself is placed on the focus of the parabola. If the parabola is 40 inches wide and 20 inches deep, how far from the vertex should the microphone be placed?
a) 4 inches
b) 5 inches
c) 8 inches
d) 10 inches
Answers: 3
Mathematics, 21.06.2019 22:50, leilaford2003
If set d is not the empty set but is a subset of set e, then which of the following is true? d ∩ e = d d ∩ e = e d ∩ e = ∅
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Mathematics, 21.06.2019 23:00, Tyrant4life
If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.
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The reflecting dish of a parabolic microphone has a cross-section in the shape of a parabola. The mi...
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