A water chips system in a garden uses 2/3 cup of water every 1/6 of an hour how much water is used one hour

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?

Why did the ice arena get so hot after the big game (this is math related google it to find the paper

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5