Answer:
Random, because he surveyed 30 <em>random</em> shoppers
Probably miles, canyons are HUGE, it's only logical to use miles
Answer:
79%
Step-by-step explanation:
He has 100% to start off. If he puts 21% into savings you subtract that from the starting amount. 100 - 21 = 79. Therefore the answer is 79%.
6xy^2 - xy + 8 + 12y is a polynomial of degree 3