Given the equation of all points equidistant from a center, what is the center point? x2 + (y + 4)= 16

Plz i want answer and i would appreciate it is is a b c or d

The deck that kenneth is building is in the shape of a parallelogram abcd the measure of angle c is one third the measure of angle b find the measure of each angle of the deck

Enter numbers to write 0.000328 0.000328 in scientific notation. 1 1 0.000328=3.28 × 0 . 000328 = 3 . 28 × =3.28×10 = 3 . 28 × 10