Which of these events or facts provides the best justification for blaming germany for world war I?

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

Find the area of the regular hexagon if a side is 20 cm.

What does the sign of the slope tell you about a line?