How much more expensive is the unit price for 14 ounces at $4.20 than the unit price for 16 ounces at $4.32?

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Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

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