If D varies directly with t and D is 105 when t is 3, find D when t is 8.
35
280
840
2 answers:
Answer:
280
Step-by-step explanation:
D = kt
105 = 3k
k = 35
D = 35t
D = 35(8) = 280
Answer:
440
Step-by-step explanation:
Let the variation factor be 'k'
D = kt
When D is 105, and t is 3
105 = 3k
Divide through by 3 to get the value for 'k'
105/3 = 3k/3
k = 55.
When t = 8,
D = 55 x 8
D = 440
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