In the figure shown, what is m _A? Explain.
57°
B
с

Which function is shown in the graph below?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Find the volume of the described solid. the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x. a) 441b) 147c) 864d) 882