Find the area and round to the nearest hundredth??

Regular price is $77.00 and the discount is 5% find the sale price

Suppose you want just guess at the answers in a 5 question multiple-choice test. each question has 3 responses and only one is correct. what is the probability of getting two questions right just guessing? 20 points 0.3275 0.2753 0.7532 none of the above

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?