Find the circumference and area of a circle with a diameter of 14 inches. Leave your answers in terms of pi. C = 140; A = 49n
O C = 7n; A = 28n
O C = 14n; A = 28n
C = 7n; A = 490

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Find the ratios of the corresponding sides

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)