In which economic system does the government have complete control over manufacturing and production?
market economy
mixed economy
o open economy
planned economy

When is a hurricane considered to have made landfall? a. when at least one inch of rain occurs b. when the eye reaches the land mass c. when the outer wind bands make landfall d. when it moves inland from the coast

In general, how long does it take to accomplish a long-term goal? a.a few days to a weekb.a few weeks to a monthc.a few months to a yeard. more than a year

An easy way to calculate the amount of energy available at each level is to what?