If y is the smallest positive integer such that 630 multiplied by y is the square of an integer, then y must be Choose the correct choice from the following
A) 20  B) 50  C) 60  D) 70  E) 140
630 = 2*3^2*5*7= 
<gadget id="calculator">2*5*7</gadget>
<output>70</output>
70.   The answer is 70.
<result>D</result>
If y is the smallest positive integer such that 630 multiplied by y is the square of an integer, then y must be