How did Emmy noether impact the world?

What does the expression minding your PS and Qs stand for? What is the amount of pi? What where roman numerals used for? When the sum of the measures of two angles is 90 degrees then the angles are called? What goes into 65 evenly? What is a dinitrated product? How many times can you reheat chili before it because unsafe and must be discarded? How Deep is shanu tank? What equation uses all operations and equals 12? What is better the combat B2 or B3? Can a scalar quantity have a zero magnitude? What does the standard error mean? Can someone have an IQ of 172? What number is roman number CXL? What is thirty and nine tenths? What is significance of imaginary part in inductor? You are about to factor a quadratic equation involving some x s some x's and a plain number you see that the sign in front of the x's is negative and the sign in front of the plain number is positive? Which digit in 5.6789 is in the thousandths place? How to change dissimilar fractions to similar fractions? How many vertices's does tetrahedron have?