i been stuck with this question. Thanks for helping in advance.
Question:Suppose you are training to run an 8km race. You plan to start your training by running 2km a week, and then you plan to add a ½km more every week. At what week will you be running 8km?
Ps: I need to use arithmetic sequence to show the working for these. Im also confused as to what equation to use in these since decimals are used. Working's would be appreciated alot.
Edit: I solved it :D
Week $1$ : $2$ km.
Week $2$ : $2.5$ km.
Week $3$ : $3$ km.
Week $4$ : $3.5$ km.
Week $5$ : $4$ km.
Week $6$ : $4.5$ km.
Week $7$ : $5$ km.
Week $8$ : $5.5$ km.
Week $9$ : $6$ km.
Week $10$ : $6.5$ km.
Week $11$ : $7$ km.
Week $12$ : $7.5$ km.
Week $13$ : $8$ km.