18 because
18•1=18
18•3=54
18•4=72
Chance coins have a greater mass because the coin mass of a quarter is 5.67 you multiply by 8, which is the number of quaters you have and you get 45.36 grams. if you do the same with the dollar coins, meaning you multiply the the mass by the number of coins, you should get 40.5 grams.
Answer:
or 21.2132
Step-by-step explanation:
<em> </em>(root of a product is equal to the product of the roots of each factor)
(simplify)
or ≈ 21.2132
