Mathematics, 10.11.2019 08:31 adyenamaie02

Marcie ran the 400-meter race 3 times. her fastest time was 51.3 seconds. her slowest time was 56.4 seconds. if marcie's average time was 53.4 seconds, what was her time for the third race?

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Marcie ran the 400-meter race 3 times. her fastest time was 51.3 seconds. her slowest time was 56.4...