B) Un ingeniero debe construir la carpa de un circo, pero necesita saber cuánto de- ben medir los ángulos de la cubierta donde se colocarán los pilares. Sólo cuenta
con los datos que se muestran en la imagen. ¿Cuánto debe medir cada ángulo?

b. 2 and 4

step-by-step explanation:

the distance between the school and her home is 3.6km.

12 mins = 0.2 hours = 1/5 hour

54 ÷ 3 = 18km per hour

1/5 of 18 = 3.6km per 12 mins

large crystals result from very slow cooling.

evaporation of water: this would produce an evaporite which is a sedimentary rock. like a salt pan in a desert. not possible to have volcanic rocks originate this way.

crystalization in molten earth: slow cooling over time. (hundreds to millions of years)

crystalization at earth's surface: this results in fast cooling. (a few hours to a few months or years)

crystalization from cooling off hot water: that would be a hydrothermal deposit. while associated with volcanics they are not volcanic rocks themselves and usually occur fairly rapidly.

(hint): the answer is in the question.