If p varies inversely as the square of...
If p varies inversely as the square of q and p=8 when q=4, find q when p =32
±16
±8
±4
±2
Correct answer is D
p ∝ 1/q
p = k/q
K = q2p
= 42(8)
∴p = 128/q
32 = 128/q
q2 = 128/32
q2 = 4
q = √4 = ± 2
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