Write and simplify an expression for the exact area of the circular object and Find the area of the circular object, using 3.14 for π (7cm diameter)

the circle one

i think is g(1)=-1.

hope that i can

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.

2+2=4

4-5=-1

is that your