Math Problem - I don't understand
(1,000 ÷ 200) × 1 =

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.

What is the geometric mean of 3 and 7? a) square root of 21 b) 2 square root of 6 c) 2 square root of 7 d) 21