45 × 13 = 585
Which is exactly how much he'd need to pay back his sister and buy the bike. So, it would take him 13 weeks.
From the graph given
For f(x), where x = 3, on the graph f(3) is
For g(x), where x = 3, on the graph g(3) is
Hence,
The answer is the second option
A=(3.14)(12.5)^2
A=(3.14)(156.25)
A=490.625 ft squared
Not sure if this is what you are looking for but welp