Answer:
Amy can knit of a scarf in 1 hour.
Step-by-step explanation:
This question can be solved by proportions, using a rule of three.
We have that:
1/10 of a scarf - 4/5 of an hour
x of a scarf - 1 hours.
Applying cross multiplication:
Answer: 15
By the trapezoid midsegment theorem,
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6 because if you multiply 2/3 by 6 it will give 4