Hey next time use your calculator, if you can.
Since these problems are using this equation :
we can derive into this immediately.
Q1: 525 (Try it, don't copy, it's not nice ;) ).
Q2: 865.28
Q3: By using logs: 0.0566 years. (I'm not sure on that one...) Sry
1 + .1 = 1.1 (Making the multiplier)
1.1 * 38.75 = 42.625
The price is $42.625
Plug it into the quadratic formula (you'll get two answers):
1. -12+-√12^2-4(3)(11)
_________________
2(3)
2. -12+-√12
________
6
3. -12+√12 and -12-√12
_______ _______
6 6