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Answer:
A
Explanation:
Givens
v = 42 ft/sec
Formula
v = 7 * (p)^1/2
Solution
42 = 7 * (p)^1/2 Divide by 7
42/7 = 7*(p)^1/2/7
6 = (p)^1/2 Square both sides
6^2 = [(p)^1/2]^2
36 = p
The answer is A
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