Answer:
Therefore the angle of intersection is 
Step-by-step explanation:
Angle at the intersection point of two carve is the angle of the tangents at that point.
Given,
and 
To find the tangent of a carve , we have to differentiate the carve.
The tangent at (0,0,0) is [ since the intersection point is (0,0,0)]
[ putting t= 0]
Again,
The tangent at (0,0,0) is
[ putting t= 0]
If θ is angle between tangent, then
Therefore the angle of intersection is .
F(x)=x^3-9x
and
g(x)=x^2-2x-3
so you just need to divide f(x) by g(x)
Therefore:
f(x)/g(x) = (x^3-9x) / (x^2-2x-3)
and of course you need to factor these two function to see if some factor would cancel another
x^3-9x = x(x^2-9)=x(x-3)(x+3)
and
x^2-2x-3 = (x-3)(x+1)
The total angle sum of a triangle is 180°
As such, 180= 78 + 2s +4s
102= 6s
s=17
1,15 3,5 are the only factor pairs
$29+$17+$13 = $59 weekly spending
So 1 month gonna be $59 times 4 = $236 per month
