Yes .3 repeating is a real number
Answer:
that box means the angle is 90 degrees.
Step-by-step explanation:
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Answer:



Step-by-step explanation:
Given

See attachment
Solving (a): 
To solve for
, we make use of:

The relationship between both angles is that they are complementary angles
Make
the subject

Substitute
for 


Solving (b): 
To solve for
, we make use of:
The relationship between both angles is that they are complementary angles

Solving (c): 
To solve for
, we make use of:

The relationship between both angles is that they are alternate exterior angles.
So:

You re write the expression by using the negative exponent 1/5.18 or 10-13