Astronomers classified the planets into six sizes with five atmosphere types and four average temperature ranges. How many different planet types are there?

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Frank owns a $141,000 home, for which he has a 30-year mortgage in the amount of $700 a month. once he has paid off mortgage, how much will he have paid in investment? a. $111,000 b. $109,000 c. $120,000 d. $141,000

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.