The correct answer is 14.2 lb which is choice D.
Let:
F = minimum force required to prevent ball from rolling down the ramp
The formula will be:
F = w * sin theta
F = w * sin (39 degrees)
F = 22.6 * sin (39)
= 14.2 lb (this is rounded to the nearest tenth)
Step-by-step explanation:

Answer:
Two legs and an hypotenuse
Step-by-step explanation:
Isn’t that what your looking for?
(1-0.15)=0.85
0.85 (155.25)=131.962
estimated answer
131.962 is about $132.00
Answer: It is a more efficient way to find x2k than by multiplying x by itself the appropriate number of times.
Step-by-step explanation: Please find the attached file for the solution