exam Maths Puzzle Numerical Ability

Angela calculates the sum of the interior angles of a regular 13-gon by multiplying 13 by 180 degrees to arrive at 2340 degrees. What mistake has Angela made and what is the correc

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The problem is:

Express the exponential function as log functions:
10^x= 1000

My answer is 3.

10^2x+1 =3

My answer is x=.2385

e^3y=1

My answer is x=.7675

Please and thank you in advance. Factor the following
x2-x-30