Answer:
4245
I hope this answer helps!
Step-by-step explanation:
Answer in the attachment
As scientists conduct their research, they make observations and collect data. The observations and data often lead them to ask why something is the way it is. Scientists pursue answers to these questions in order to continue with their research.
9 + (-5) = 4
-8 - 4 = -12
8 - (-4) = 12
-9 + 5 = -4
$9
If you do 13x1.50= 19.5
28.50 - 19.5 = 9
