Step-by-step explanation:
Given that,
The area of a blackboard is 
The area of poster is 
We need to find the unit rate of the blackboard's area to the poster's area. So, it can be calcualted by dividing blackboard's area to the poster's area.
So,

So, the rate of
.
Answer: B
Step-by-step explanation:
because it has nothing to do with the question
Answer:
7
Step-by-step explanation:
make a number line from 0 to -12. Find -5 as well as, -12. then count how many times it takes you to get from -5 to -12.
OR
you can just do 12-5=7
Hope this helped
Answer:
(a) 552ft
(b) $220.8
Step-by-step explanation:
(a) TSA of cuboid = 2 (lb + bh + hl)
= 2 (12*8+8*9+9*12) = 2 ( 276) = 552 square feet.
(b) Cost of covering the box = $0.40 * 552 feet
= $220.8