2008
Mathematics
67ca00ce0c643c71d77dee1f
If p varies inversely as the square of q and p=8 when q=4, find q when p =32
A.
± 16
B.
± 8
C.
± 4
D.
± 2
Correct Answer: ± 2
Explanation
p ∝ 1/q p = k/q K = q2p= 42(8) ∴p = 128/q 32 = 128/q q2 = 128/32 q2 = 4 q = √4 = ± 2
p ∝ 1/q p = k/q K = q2p= 42(8) ∴p = 128/q 32 = 128/q q2 = 128/32 q2 = 4 q = √4 = ± 2THIS WEEK's
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