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If a train travels 150 kilometers in 2.5 hours, what is its speed?Calvin is 8 years older than Justin. In 5 years, Calvin will be twice Justin's age. How old are they today?4500 dollars is placed in an account with an annual interest rate of 7%. To the nearest tenth of a year, how long will it take for the account value to reach 10800 dollars?A poker hand consisting of 4 cards is dealt from a standard deck of 52 cards. Find the probability that the hand contains exactly 3 face cards.Round your answer to 4 decimal places as needed.the product of a number and ten is six