Calculus, pls help quickly, photos attached.

Aladder that is 30 ft long needs to reach 27 ft up a building. what should the angle of the vertical be?

The hypotenuse of an isosceles right triangle is $14\sqrt 2$. what is the area of the triangle?

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.