What is the value of k? 1/2k+6=4k–812k+6=4k–8

Which of the following is the missing term, a2, of the geometric sequence in which a1=2 and a3=200

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

Which of the following contains a variable?