I just had this problem at rsm
the answer is 950 trees
X=2
its x=2 because you have to divide -20x by -40 so the two negatives cancel out each other and then you get 2.
D is the answer for equivalent
radians = degrees x PI/180
radians = 60 x pi/180 = 1.04719 radians
round answer as needed
if you need it in terms of pi it would be PI/3 radians
D(x)=1375-110x
when it reaches 0 it has reached destination
0=1375-110x
add 110x to both sides
110x=1375
divide both sides by 110
x=12.5
answer is 12.5 hour
