Since the exchange rate of euro to USD right now is 1:1.11, therefore he spent 150x1.11=166.5 USD. Therefore, he has 250-166.5=83.5 USD left(assuming the exchange rate is the same, 1.17).
6,12,24,48,96... when we multiply by 2
-6,12,-24,48,-96.... when we multiply by -2
a) q can be 24 or -24
b)p/r=6/96 =-6/-96= 2/32=1/16
c) a(n)=6*2^(n-1)
386=6*2^(n-1), 386/6=2^(n-1), 64,333(3)=2^(n-1),
we will not be able to find whole number n for number 386, so 386 is not a term in this sequence, because it does not follow the rule of this sequence
You have to work this out step-by-step.
Population started at 1000.
It went up 10%: 1000 + 10%(1000) = 1000+100 = 1100
Now it's 1100
It then went down 20%: 1100 - 20%(1100) = 1100 - 220 = 880
Now it's 880.
It then went back up 10%... I'll let you try the last calculation.
Can you take it from there?