una escalera está apoyada en la pared, el ángulo de la base es de 45°, la escalera mide N m. ¿a que distancia de la base hacia la pared está la escalera?​

What is the mercury length of time for one revolution around the sun?

What is the difference between emigrate and immigrate? ?

In russia which of these challenges affects the transportation of both petroleum products and other goods? a poorly repaired roads b harsh weather and vast distances c frozen waterways d separatist movements