1:A customer has requested a bookcase with the two shelves having a total
area of 864 square inches. What
should b equal to meet the customer's
specifications?

2: Barnard has a stain on his wall and would like to cover it up with a bookcase. What should b equal in order for the back of the bookcase to cover an area of 4800 square inches

1. 8.5 inches

2. 20 inches

Step-by-step explanation:

1. Total area of the shelve = (4b x 3b)

864 = 12

      = 12

=  

   = 72

b =

  = 8.486 inches

b = 8.5 inches

2. Bernard wish to cover an area of 4800 square inches.

Then,

Area = length x width

4800 = 4b x 3b

         = 12

=

   = 400

b =

   = 20 inches

The value of b should be 20 inches.

i would go with the first one

step-by-step explanation:

hope this