Answer:
New area: 12ft^2
Step-by-step explanation:
1/3 of 9 is 3
1/3 of 12 is 4
Area = l x w
so 3 x 4 = 12
Your answer is 98. Is there a multiple choice?
29.75/8.5=x/4.5
using the "butterfly method"
8.5x=133.875
/8.5 /8.5
x=15.75
You have to make a proportion
Unit vector along the direction v = <3,1,-4> is :

So, unit vector opposing the
is :

so, vector of magnitude 3 units in opposite direction from v is :

Hence, this is the required solution.
I believe the answer is C