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jeka57 [31]
3 years ago
14

ASAP PLEASE HELP!!!

Mathematics
1 answer:
Mariulka [41]3 years ago
8 0

Z score = (x -mean) /  standard deviation.

For this problem X = 50 cm.

Z-score = (50 - 49.2) / 1.8

Z score = 0.8 / 1.8

Z score = 0.44

Look up 0.44 on a z-score table.

0.44 = 0.6700

0.67 x 100 = 67% will be 50 cm or longer.

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<em>Josh would need to purchase 20 gallons of gas for the cost to be the same at each car wash</em>

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