Answer:
It looks right to me
Step-by-step explanation:
The answer would be the first choice. 
Explanation: The reason for this is that the question was pretty much just asking what the area of the resulting two-dimensional cross section would be -the shape in gray- (which can be found by using the formula
. To add on, since the dimensions of the shape are already given (5 and 3) all you've to do is multiply: 3*5=15
That's how you get to the answer.
Answer: 81
Step-by-step explanation:
(3^2)^2=81
Hope that helped
If 2 plus 2 is four... then what the hell is this?