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saw5 [17]
3 years ago
12

If D varies directly with t and D is 105 when t is 3, find D when t is 8. 35 280 840

Mathematics
2 answers:
drek231 [11]3 years ago
5 0

Answer:

280

Step-by-step explanation:

D = kt

105 = 3k

k = 35

D = 35t

D = 35(8) = 280

zhenek [66]3 years ago
5 0

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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