Answer:
10.99
Step-by-step explanation:

where you see tan20 the 20 has a degree sign on top
A.Equation
Step-by-step explanation:
A. Equation 30 plus 4
The answer is -8. Do you need an explanation?
Answer:
Option (3). EF
Step-by-step explanation:
From the figure attached,
Plane defined by EAB can be represented by the face EABF of the square prism also.
Similarly, plane EFG can be represented by the face EFGH of the prism.
Now these sides EABF and EFGH are joining each other at the edge EF of the cuboid.
Therefore, intersection of the given planes is EF.
Option (3) will be the answer.