Answer:
1 pencil will be for 1.75 $
15% = 15/100 = 0,15
<span>total ticket sales = </span>$375 : 0.15 = $2,500
<span>Total mass contains 320g copper. How many parts of 16g copper are there of the total mass of 320g copper? 320/16 = 20. There are 20 portions of 16g copper.
(320/16) * 3 = 60g
There are 60g of zinc in the compound.</span>
