One at 100,18 one at 200,14 one at 150,15 one at 125,20 and one at 225,12
The pair of points that are equal to x coordinates is (0,0)
She nee to save $60 more so she can buy a new bike
the difference from 40000 to the future value in 2020, namely 5 years later is simply the yield or interest amount.

Good question!
First of all, you need to be aware of the following trigonometrical ratios\functions:
For angle A:
adjacent=12
opposite=35
hypotenuse=37
Hence:

I hope that
helps!
I am with you if you faced any difficulties!