Answer:
88 Tickets were sold
Step-by-step explanation:
20*$4=$80
$216-$80=$136
$136/2=68
20+68=88 tickets
2 * 10^3 = 2000.
3.8/1.9 * 10^5/10^2
= 2 * 10^3
I got h = 11.31371.
Hope this helps!
(2+i)(2-i)