Chen rode his skateboard 334 miles in 34 of an hour. What was his average speed in miles per hour?

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Ineed to know the answer right now! !

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

In a fifth grade class, 3/5 of the girls have brown hair. of the brown-haired girls, 3/4 of them have long hair. of the girls with long brown hair, 1/3 of them have green eyes. what fraction of the girls in the class have long brown hair?