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)
Answer:
It is 
Step-by-step explanation:
the four is multiplied 5 times
If it took you (one person) 3 days to build a doghouse, then it should take 2 people to build it in half the time. So all we have to do is split 3 days in 2.
3/2 = 1.5
So it would take 1 1/2 days or 36 hours for 2 people to complete the doghouse.
900x300=270,000 plus 2 would equal 270,002.4 devided by 3-2001 would equal 87,999.8
Maybe write it down, like how you see other math problems.
And then solve it!
:D
