Can the ratio of a parents age to his/her child's age ever be exactly 10: 9? explain.

No, it can never be a ratio of 10:9 because that would mean let's say I'm 9 and my parents are 10 years of age that would have to mean my parents reproduced me at age of 1 years old which is very highly impossible.

Now the question asks how much money do you have after the 6-month payment plan. We know Albert paid $192 per month. Now in total, there is an interest rate of 28.79%. We can divide that this total percent to see how much interest he paid per month.28.79/6 = 4.798