an architect creates a scale model of a building with a scale of 3 inches = 11 feet. if the actual width of the building is 121 feet, what is the width of the scale model

Here is their argument. given the obtuse angle x, we make a quadrilateral abcd with ∠dab = x, and ∠abc = 90◦, and ad = bc. say the perpendicular bisector to dc meets the perpendicular bisector to ab at p. then pa = pb and pc = pd. so the triangles pad and pbc have equal sides and are congruent. thus ∠pad = ∠pbc. but pab is isosceles, hence ∠pab = ∠pba. subtracting, gives x = ∠pad−∠pab = ∠pbc −∠pba = 90◦. this is a preposterous conclusion – just where is the mistake in the "proof" and why does the argument break down there?

Ineed with number 17 i don’t get it at alll

What is the logarithmic function modeled by the following table? x f(x) 9 2 27 3 81 4