When f(x)=-3, what is x?
1 answer:
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Answer:
16 feet
Step-by-step explanation:
Set up a proportion where x is the height of the tree:
=
Cross multiply and solve for x:
5x = 80
x = 16
So, the tree is 16 feet tall
Solution :
Let be the unit vector in the direction parallel to the plane and let
be the component of F in the direction of
and
be the component normal to
.
Since,
Therefore,
From figure,
We know that the direction of is opposite of the direction of
, so we have
The unit vector in the direction normal to the plane, has components :
Therefore,
From figure,
∴
Therefore,
