D. To prepare premium rates the amounts customers pay) for an insurance plan, an insurance company conducts an extensive risk study to
determine the probability that a member of a certain group may require
a pay-off. Based on these probabilities, the expected amount of payoff
is charged to the customer as part of the premium. Explain why car
insurance companies charge a higher premium for teenage drivers
with a clean driving record than for adult drivers with a clean driving
record.

x-150=475   x=625

step-by-step explanation:

if the bike after the sale ($150) is $475 then just simply add 150 to 475.

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.