I don’t see a diagram ? Just numbers...
Answer: for the multiple choice question, its the first one. Then for number of friends it goes, 5,10,15,20 and the cost goes 100,200,300,400. hope this helped!!! xoxo
Answer:
21.35 
Step-by-step explanation:
It is given that the box is a triangular prism.
Side of Base of prism = 7 ft
Height of Base of prism = 6.1 ft
Area of a triangle is given as:


Volume of a prism is:

B is the area of base of prism
h is the height of prism
Here, h = 1 foot
So, V = 21.35
1
Volume of prism is = 21.35 
<em>Sand required to fill the triangular prism shape box is 21.35 </em>
.