Is that even an actual equation?
Answer:
36cm^2
Step-by-step explanation:
4cm×9cm=36cm^2
------------------------(- K)-------------0-------------(+K)-----------------
K unit to the left of 0, means K is negative.
The opposite of (-K) is (+K), both are symmetric vs. the origin "0", then its location will be +K
$58.80 you need to multiply 2.80 x 21 to get your answer
