Answer:

or
Step-by-step explanation:
we know that
The volume of the rectangular prism is

where
L is the length
W is the width
H is the height
substitute the given values in the formula


Simplify
---> fraction form
or
----> decimal form
Part A is 6 and the bottom one is "Take a line and connect it from point C to the middle of A and B then put another line connecting to D to the middle of A and B"
Step-by-step explanation:
there is no reason in maths only the method
$1.60
Divide 80 by 50 to find the cost of one brownie which will then lead you to get you the answer of $1.60