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:

→

%

→

%

$

→

%

$

→

%

$

→ $

`1234567890-=/*-qwertyuiop[]asdfghjkl; '\\zxcvbnm,./+ /

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)