Answer:
We have, 63% × x = 252
or,
63/100 × x = 252
Multiplying both sides by 100 and dividing both sides by 63,
we have

x = 400
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Answer:
10
Step-by-step explanation:
Answer is A, basically using the Pythagorean theorem but in a slightly different way, should still get you the same answer.
Step-by-step explanation:
the process is show in the above picture.