Answer:70
Step-by-step explanation:
multiply 38 to get 76 and then subtract 6
$29.99=$30
$30-$15=$15
Ace's profit is $15
<h3>
Answer: 78.6</h3>
Work Shown:

Multiply across the rows to form a third column. Example: 9*90 = 810 in the first row.

The values in the third column add to 810+1440+1050 = 3300
Divide this over the total number of people which is 9+18+15 = 42
The mean is 3300/42 =78.571 approximately which rounds to 78.6
16x2=32
21x2=42
32+42=54
the perimeter is 54