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Mathematics 11 Online
OpenStudy (anonymous):

D varies directly with t. D is 105 when t is 3. Find D when t is 8. 35 280 840

OpenStudy (anonymous):

280. If D is 105 when t is 3 then when t = 8, D is x. You can try to find the system from there

OpenStudy (anonymous):

D=mt, m=some constants, so 105=m3, m=35, D=35t, D=35*8=280

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