2010
Mathematics
67ca00ce0c643c71d77dee1f
If y varies directly as the square root of x and y = 3 when x = 16. Calculate y when x = 64
A.
12
B.
6
C.
3
D.
5
Correct Answer: 6
Explanation
y ∝ √x y = K√x K = y/√x = 3/√16 = 3/4 y = 3/4√x = 3/4√64 when x = 64 = 3/4 x 8/1 = 6
y ∝ √x y = K√x K = y/√x = 3/√16 = 3/4 y = 3/4√x = 3/4√64 when x = 64 = 3/4 x 8/1 = 6THIS WEEK's
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