It’s 1 that’s in the ten billions
Keeping in mind that 16 = 2*2*2*2, thus 16 = 2⁴
I got 12.654 I'm not sure it is right though.
13 x 6 = 78 it cant be multiplied anymore so it can go into 80 about 6 times.
Distance formula ds = v(dx² + dy²) s = ? v(1 + (dy/dx)²) dx ......... s = the arc length y = 171 - x²/45
chegg
someone solved it on this
https://youtu.be/UGjXlMVdZvc