Reina's work (84) 5 (73) 9 = 84 + 573 + 9 = 8to the ninth power7to the twelfth power Sam's Work (84) 5 (73) 9 = 84⋅573⋅9 = 8to the 20th power 7 to the 27th power

Which one is right

explain.

Can 3 13/20be written in simplest form

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A training field is designed by joining a rectangle and two semicircles, as shown below. The rectangle is 81m long and 49m wide. What is the length of a training track running around the field

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