Pre-calculus ? polar and parametric equations?

When y’all answer can y’all explain too !

Abakery recorded the number of muffins and bagels it sold for a seven day period. for the data presented, what does the value of 51 summarize? a) mean of bagels b) mean of muffins c) range of bagels d) range of muffins sample # 1 2 3 4 5 6 7 muffins 61 20 32 58 62 61 56 bagels 34 45 43 42 46 72 75

What is the approximate value of  x  in the equation below.–3.396–0.7080.3040.955