At the start of 2014 mikes car was worth £12000 the value of the car decresed by 30% each year work out the vale of the car at the start of 2017

 £4116.

Step-by-step explanation:

Each year the car is worth (100-30) =   70% or 0.70 of its worth the previous year.

At the start of 2017 the car was 3 years old.

The equation to work out its value  is

V = A(0.70)^t      where A is  12,000, t = the number of years.

So we have, at the start of 2017:

V = 12,000 (0.70)^3

= £4116.

Step-by-step explanation:

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%

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$

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$

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$

→ $

not sure but it may be b, as i said i'm not sure.