The price p (in dollars) and the quantity x sold of a new smartphone obey the demand equation p=-1/10x +1000 what quantity x of the new smartphone maximizes the revenue

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)

Find the percent error of the measurement 4 cm