In the video, the water level was 15 milliliters before adding the chain, and 20 milliliters after adding the chain. When I weighed the chain, its mass was 66.3 grams. I believe the chain is solid metal (not gold plated), but is probably a blend of gold and other metals. I looked up that gold has a density of \( 19.3 \mathrm{~g} / \mathrm{ml} \), while the other metals like silver and copper usually blended with gold have a combined density of about \( 9.7 \mathrm{~g} / \mathrm{ml} \). Determine what percentage of the chain is gold, by mass, to at least 1 decimal place? \%

\( \$ 12 \) más un cargo alquila botes de remo por Laura gastó \( \$ 30 \) para palquilar \( \$ 6 \) por hora. de remo. Usa la siguiente ecuación para encontrar h, el número de horas que Laura usó el bote de remo.

Jen Butler has been pricing Speed-Pass train fares for a group trip to New York. Three adults and four children must pay \( \$ 122 \). Two adults and three children must pay \( \$ 87 \). Find the price of the adult's ticket and the price of a child's ticket.

1. What were the three major goals of Andrew Mellon? 1. 2. 3. 2. Define supply- side economics: 3. By 1928 Congress reduced what to 0.5 Percent for most Americans?

\( A=\{3,4,5,7,10\} \), and \( B-\{2,3,5,6,7\} \). Given a set \( S, S^{c} \) denotes the complement of \( S \). Find each of the following sets. Enter your answer by listing the elements in increasing order, separated by commas. Do not put a comma after the last number. If the set is empty, enter DNE. \( A \cup B^{c}=\{ \)

write all subsets of the set \( \{503\} \)