A high tech company operates a satellite which can measure the size of features on the surface of the earth. They use this technology to measure a particular rectangular field and find it's length to be 311 \pm± 1.89 (in meters) and it's width to be 354 \pm± 1.39 (in meters). They plan to report the area of the field as A\pm\Delta AA ± Δ A in units of acres. (1 acre = 4840 square yards & 1 meter = 1.094 yards) What is \Delta AΔ A?

Determine the common ratio and find the next three terms of the geometric sequence. 649-14-02-00-00_files/i0100000, 649-14-02-00-00_files/i0100001, 2, a. 3; 649-14-02-00-00_files/i0100002, 649-14-02-00-00_files/i0100003, 649-14-02-00-00_files/i0100004. c. 649-14-02-00-00_files/i0100005; 649-14-02-00-00_files/i0100006, 649-14-02-00-00_files/i0100007, 649-14-02-00-00_files/i0100008. b. 3; 6, 18, 54 d. 649-14-02-00-00_files/i0100009. 6, 18, 54 select the best answer from the choices provided a b c d

Can someone me with this? i’m not sure what to put for my equations.

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?