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If z varies inversely as w and z=40 when w=0.1, find z when w=20

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  1. 8 July, 19:18
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    Z varies inversely as w ⇒ z*w=k

    z=40, w=0,1 ⇒40*0,1=4=k

    z*20=4

    z=4/20=1/5

    z=0,2
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