C
All u have to do is add 23.5 to 23.5
Let x: number of tickets that sold on Friday, y: number of tickets that sold on Saturday night
16x+28y=24232
x+y=1090
x=1090-y,
so 16(1090-y)+28y=24232
17440-16y+28y=24232
12y=6792
y=566. As a result, there will be 566 tickets sold on Saturday night. Hope it help!
One grid will be completely shaded, to represent the 1 .
The other grid will have exactly 47 of the 100 little squares shaded. That's exactly .47 of the whole grid.
Circumference of whole circle =

360÷20=18

hence length of arc = 1/3 pi