Answer: 10
Step-by-step explanation:
$12.75 divided by 15 pens = $0.85 per pen
$17.40 divided by 20 pens = $0.87 per pen
the first store has the lower price for pens. when you calculate the price of one singular pen, the first store sells them for $0.85 however the second store sells them for $0.02 more ($0.87)
Considering that the trench is modeled by a rectangular prism, the volume that was removed is 1776 cubic feet.
The volume of a <u>rectangular prism of length l, width w and height h</u> is given by:

In this problem, we want the measures in feet, and considering that 1 feet is 12 inches:
- The length is of 102' 6''(102 feet and 6 inches), hence
.
- The width is of 5' 4'', hence
.
- The depth(height) is of 3' 3'', hence
.
Then:

The volume that was removed is 1776 cubic feet.
To learn more about the volume of rectangular prisms, you can take a look at brainly.com/question/17223528