A. The Jacobian for the transformation
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is

B. This question seems to be incomplete...
Answer:
9n + 2
Step-by-step explanation:
Answer:
John takes 20 steps in 10 yards.
Step-by-step explanation:
1 yard = 36 inches
10 yards = 36 x 10 = 360 inches
Since John's step covers 18 inches, divide 360 by 18.
360/18 = 20 steps