The probability that a student guesses the correct answer to a five-choice multiple choice question is ​P(correct)=0.2. How many correct answers should a student expect to guess on a test with 85 five-choice multiple choice​ questions?

The correct answer would be "convenience"

Where are the functions?

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's