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Mathematics, 15.12.2020 14:00 RKT28

A roller coaster at a theme park takes fans on an exciting ride. In the first 20 seconds, it carries passengers up a 30-meter hill, plunges them down 30-meters, and takes them back up a 15-meter rise. How much higher or lower from the start of the ride are they after these 20 seconds? step-by-step answer extremely needed please:)!

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A roller coaster at a theme park takes fans on an exciting ride. In the first 20 seconds, it carries...
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