The right answer may be option 4
Answer: About 43% of the paintings are displayed on the first floor.
Step-by-step explanation: For this problem we can use a percent equation to solve for p, the percent of paintings that will be displayed on the first floor.
Lets write the percent equation:
40/92 = p/100 (We basically are finding 40 out of 92 paintings is what percent of the total paintings.
40/92 x 100 = p/100 x 100 (We always multiply both sides by 100 when dealing with percent that are out of a whole, or 100.)
40 x 100 = 4000/92 = ABOUT 43. p/100 x 100 = p.
About 43 = p
So about 43% of the paintings are displayed on the first floor.
ANSWER


EXPLANATION
We want to solve

where

We reciprocate both sides of this trigonometric equation to obtain:

We take arctangent of both sides to get;


This is the principal solution.
The tangent ratio is also positive in the third quadrant.
The solution in the third quadrant is

Textbook is y
Notebook is x
Formula
800 = 80y + 4x