The half-life of a radioactive kind of
cadmium is 14 years.
How much will be left
after 28 years, if you
start with 72 grams of it?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

(mc 02.03) what set of reflections and rotations would carry rectangle abcd onto itself? reflect over the y-axis, reflect over the x-axis, rotate 180° rotate 180°, reflect over the x-axis, reflect over the line y=x reflect over the x-axis, rotate 180°, reflect over the x-axis rotate 180, reflect over the y-axis, reflect over the line y=x

Ineed i been stuck on this question since yesterday