Answer:
42 laps
Step-by-step explanation:
267.5
302.5
372.5
600
Simple interest
PV(1+it)
1 year:
250(1+.07)
3 years:
250(1+.07*3)
7 years:
250(1+.07*7)
20 years:
250(1+.07*20)
the second solution . 3/18 = 6/DG