For what value of \( x \) is the following true? Give your answer as an integer or a fully reduced fraction. \( \log (x+3)=\log x+\log 10 \) Your answer is: \( x=\square \)

a) \( 180: 30+\sqrt{81}+5 \cdot\left(63: 7-4^{0}\right)= \)

\( \frac{d}{dx}arccot(\sqrt {x^{2}-1}) \)

Frovided table. \[ \sin 48.4^{\circ} \] prof the trigonometric function. Round off the result according to the \( \sin 48.4^{\circ}=\square \)

33. Ikkita ishehi birgalikda ishlab 1456 stul yasadi. Agar birinchi ishchi bir kunda 32ta, ikkinchisi esa 24 ta stul yasagan bo'lsa, ularning har biri jami necha stuldan yasagan?

Use turquoise (equilateral) triangles to investigate if a vertex of a polyhedron can be formed with fewer than three edges. Use a sketch to support your thinking.