Set up multiplication/division of ratios to cancel out units you don't need for the final answer and introduce those that you do.
We have m/s and we want m/min so
(100m/s)(60s/min)=6000m/min
6 goes into both 42 and 108 (9x12 so you are working with equal measurements) and you get 7/18
Lines b and c
they both go up 2 and over 1 (rise over run is slope)
It simple ☺ idk how to help u. hope this ll help u understand. place ur pencil on B's dot n make it move 3 units to the right then 2 units to the up. same goes to A n C. u ll get the ans.
A= P(1 + r/n) ^nt
21000=7000(1+0.055/2)^1t
t = 20.52 years