Question

Isaiah can read

1/16
of a book in
1/2 an hour. At this rate, how long would it take him to finish half of the book?
O A. 8 hours
OB. 4 hours
O C. 16 hours
O D. 2 hours

Answer 1

B. 4 hours

Explanation:

If he can finish 1/16 of the book in 1/2 of an hour, we must figure out how long it takes to finish 1/2 of the book. 1/16 of the book is 1/8 of 1/2 of the book, as 1/8 times 1/2 =1/16. This means we must multiply the length it takes him to read 1/16 of the book by the reciprocal of 1/8, or 8. So now we multiply 1/2 by 8 and get 4, so our answer is B.4 Hours