3. Landmarks are placed along the road from London to Edinburgh and the distance between each landmark is 16.1 km. The first milestone placed on the road is 124.7 km
from London, and the last milestone is near Edinburgh. The length of the road from
London to Edinburgh is 667.1 km.
(a) Find the distance between the fifth milestone and London.
(b) Determine how many milestones there are along the road.

4. The sum of the first 10 terms of an arithmetic sequence is 235, and the sum of
the second 10 terms is 735.
(a) Find the 12th term.
(b) Write down the sum of the second 10 terms in sigma notation.
(c) Using GDC, show that the sum in part(b) gives 735. Show the screenshot too.
5. Nanako takes out a loan of $16 000 to buy a car. The loan has a simple interest rate of
8% per year. She pays back the loan at a fixed rate pf $250 per month. Find how long it
will take for Nanako to repay the loan.