It's a ball, so we don't have to worry about friction. Wouldn't it just be 22.6sin(39) = 14.22 pounds of force? Conceptually, at an angle 0 (flat), we would need 22.6sin(0) = 0 pounds of force, and at angle 90 (vertical), we would need 22.6sin(90) = 22.6 pounds (all of it). So it should be 14.22 pounds. And since this is a mathematical question, rather than physics, I'm assuming you don't need to convert to newtons or anything.
Basically a terminating decimal is a decimal with an exact answer when you have no remainder left over. A repeating decimal is when you can never reach zero no matter how many times you divide the answer. It is always written with a line on top to show that it goes on forever and ever and it never ends.
A=Pe^rt
where:
A=amount
P=principle
t=time
r=rate
Plugging our values in the equation and solving for r we obtain:
1833=1500e^(5r)
solving for r we get:
r=0.0401
Answer: r=0.0401
Observe that 
is the square of 
, and 625 is the square of 25.
So, your expression is a difference of squares, and as such we can rewrite it as
Now again, is the square of 
, and 25 is the square of 5. So, we have a sum and a difference of squares.
But if we think of 25 as 
, we have again the difference of two squares, so we have
The unit price would be $30 per kg
