If 0.1 ≤ b < 1, what is b 10^{k} in standard form? Give your answer in terms of b and k.

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Atotal of 766 tickets were sold for the school play. they were either adult tickets or student tickets. there were 66 more student tickets sold than adult tickets. how many adult tickets were sold?

If a and −a are numbers on the number line, which expression must give the distance between them? a) 0 b) a c) |2a| d) |a|

How do i simply this radical expression?