9.4: Rare Events, the Sample, Decision and Conclusion Homework PLEASE HELP! Should be easy but i cant figure out what I'm doing wrong when I do it from an online calculator?

SEE ATTACHMENT :)

Your answer would be ahere is how: perimeter is how long all the sides are. in a rectangle, there are two sets of parallel sides. so, to find this, we would to the following.(15x2)+(4x2)30+838if you have questions ask! and mark me brainliest! i really wanna level up : 3

I’m confused this is what i’m doing in class but the question is confusing