Answer:
24 books.
Step-by-step explanation:
The number of books that that can be fitted into the shelf is equal to the width of the self divided by the width of each book:

1/4
The coefficient is the number attached to a variable.
C=2πr
r=C/(2π), now the surface area is:
A=4πr^2, using r found above we have:
A=4πC^2/(4π^2)
A=C^2/π, we are given that C=28 so:
A=28^2/π in^2
A=784/π in^2
A≈250 in^2 (to nearest square inch)
Answer:

Step-by-step explanation:
The fraction of bran muffins is expressed as bran muffins over total muffins.
Total muffins = 6 + 2 + 4 = 12 and bran muffins = 4, thus
fraction =
← divide ( cancel ) each value by 4 )
fraction =
← in simplest form
Answer:
C(t)= 80 · (0.9)^t
Step-by-step explanation: Its the correct one on khan academy