1. 6+n
2. n/2
3. n/4
4. seven less than a number
Answer:
The volume of the triangular prism is 
Step-by-step explanation:
we know that
The volume of the triangular prism is equal to

where
B is the area of the base
H is the height of the prism
<em>Find the area of the triangular base B</em>

substitute the given values

<em>Find the volume</em>

M = 6n + 21 + 15r
Should be right
1.89*10=18.9 because the place value switches over one time to the right.