The volume formula of a pyramid is:
V =

x length x width x height
The given are
Length = 24 cm, Width = 18 cm, Height = 35 cm
Substitute the values to find the volume
V =

x 24 x 18 x 35
V = 5040 cm³
Answer:
4 books for $26
Step-by-step explanation:
4 books for $26
Take the price and divide by the number of books
$26/4 =$6.50 per book
6 books for $42
Take the price and divide by the number of books
$42/6 = $7.00 per book
The better buy is 4 books for $26
Seven eighth, 7 over 8, 7/8, 0.875,
The volume of the box in this problem doesn't really matter, considering that a cereal box is hollow. Assuming the surface area is 174 inches², then you can simply multiply 0.05 x 174, which is 8.7. Then put that number in the form of money to get $8.70. (seems a bit pricey for one cereal box to me ;P)