What are the values of a1 and r of the geometric series?
1 + 3 + 9 + 27 + 81

a. a1=1 and r=1//3
b. a1=1/3 and r=1
c. a1=1 and r=3
d. a1=3 and r=1

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]

For every corresponding pair of cross sections, the area of the cross section of a sphere with radius r is equal to the area of the cross section of a cylinder with radius and height 2r minus the volume of two cones, each with a radius and height of r. a cross section of the sphere is and a cross section of the cylinder minus the cones, taken parallel to the base of cylinder, is the volume of the cylinder with radius r and height 2r is and the volume of each cone with radius r and height r is 1/3 pie r^3. so the volume of the cylinder minus the two cones is therefore, the volume of the cylinder is 4/3pie r^3 by cavalieri's principle. (fill in options are: r/2- r- 2r- an annulus- a circle -1/3pier^3- 2/3pier^3- 4/3pier^3- 5/3pier^3- 2pier^3- 4pier^3)

What are the domain and range of f(x)= -log5(x+2)