20 : 0.75 = 40 : 1.5 = 80 : 3
Answer: 2
Step-by-step explanation:
I hope this helps!!!
I we consider her running times as an arithmetic series with common difference:
43.13 - 43.1 = -.03/2 = -.015, Shelly's time in the fourth race will be 43.1 - .015 = 43.085.
Step-by-step explanation:
One's digit of N can be 2 or 7.