Answer:
I think the star just means a variable.
<h2>A. $123.51</h2><h2 />
: $24.48 per year + price * 0.85
: $36.83 per year + price * 0.75
Substitute each value into both equations as price.
A:
129.4635
129.4625
B:
98.158
101.84
C:
145.2055
143.3625
D:
155.703
152.615
A is the lowest value where the second value is lower than the first.
3/7 is in simplest form, because they are both prime numbers and have no factors.
513 as a percentage of 900 can be re-written as;

= 57 percent