How do you answer this ?

A = 113.14 in^2

Step-by-step explanation:

The circumference is given by

C = 2 * pi *r

37 5/7 = 2 * 22/7 * r

Change the first number to an improper fraction

(7*37+5)/7 = 44/7 r

264 /7 = 44/7 r

Multiply each side by 7/44

7/44 *264 /7 = 44/7 r * 7/44

6 = r

Now we need to find the area

A = pi r^2

A = 22/7 * 6^2

A = 22/7 * 36

A =792/7

A =113.1428571

To the nearest hundredth

A = 113.14 in^2

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.