3) Consider these two facts: (a) The Earth has been hit by as many impactors as the Moon and Mars. (b) The state of Washington has a total land area of about 177,000 km2. Calculate how many 5-km-sized craters have been formed in Washington state over the last 4 billion years. (Show your work.] 4) Currently the state of Washington has zero 5 km impact craters. What happened to them?
3) Consider these two facts: (a) The Earth has been hit by as many impactors as the Moon and Mars. (b) The state of Washington has a total land area of about 177,000 km2. Calculate how many 5-km-sized craters have been formed in Washington state over the last 4 billion years. (Show your work.] 4) Currently the state of Washington has zero 5 km impact craters. What happened to them?
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