In which expression should the exponents be multiplied? a. 2 to the 9th over 2 to the 7th b. (6 power of 10)power of −7 c. one half to the 3rd times one half to the 5th d. 52 ⋅ 54

Non-euclidean geometry was discovered when, in seeking cleaner alternatives to the fifth postulate, it was found that the negation could also be true a. true b.false

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Two trains leave stations 546 miles apart at the same time and travel toward each other. one train travels at 95 miles per hour while the other travels at 115 miles per hour l. how long will it take for the two trains to meet