If the mean of the observations: x+1, x+2, x+3, x+4, x+5, x+6, x+7, x+8, x+9, x+10 is 20, what is the mean of the last three digits?

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

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

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?