The formula I=PRT where I =internet, p =principal R=rate and T =time is used to calculate the amount of simple internet earned solve the formula for T

table 3 represents a direct variation function. : )

the answer is a. 72. but i cant answer with less than 20 characters so here's some random text talking about it.

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.