Answer:
V = 792 m3
I am kinda guessing on this since you didn't provide a unit or label what the height, width, and length are. Also you should specify what prism...
ANSWER
56.1 square inches.
EXPLANATION
The area of this triangle can be calculated using the formula,

where a=8in.
b=14.2 in.
and C=99° is the included angle.
We plug in these values to obtain,


We round to the nearest tenth to get,
56.1 sq. inch
3+1/x *x = 7/x*x
3x+1 = 7
3x+1-1=7-1
3x=6
3x/3 =6/3
x =2
The answer is $213 because you subtract the price sold by the price he bought them for and then you add them together (see work)
They need to be number C plus 3-2:7