.
First calculate the circumference of the circle with the given radius  C = 
  inches = 2*3.14*10 = 62.8 inches.
Then take  the   
   part of this value, which is the length of the arc :   
 = 9.42 inches.    ANSWER
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I perfectly remember this post from yesterday, and my response to it.
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Comment from student: Thank u - I am a parent trying to check my kids work during homeschooling - I never took Algebra
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My response:  --- May I give an advise to you ?
    Put this phrase 
        "I am a parent trying to check my kids work during homeschooling - I never took Algebra."
    as a very first phrase in your post - then we, the tutors, will understand your request perfectly: 
    for whom we are working and what you expect from us.
    Otherwise, I assume that I communicate with a full scale student, who knows, at least, the basics of Math 
    and can follow his part of the way on his (or her) own.
Ok ?