Leave your answer in simplified radical form.

What is the measure of sty in oo below? 130 310 230 50

Which situation is an example of an observational study?

Which of the following questions describes the equation g + (-4) = -5? a)what number, when added to negative four, is equal to negative five? b)what number, when added to negative five, is equal to negative four? c)what number, when subtracted from negative four, is equal to negative five? d)what number, when subtracted from negative five, is equal to negative four?