[Q]: Objective: how do you shut the screen off on an iphone?
[A]: press the lock key on the side.

[Q]: Objective: how to sanitize a marble counter top
[A]: use rubbing alcohol to wipe down

[Q]: Objective: To join two lengths of PVC pipe together, you can
[A]: Push them together until they snap into place

[Q]: Objective: How to bake a cake.
[A]:
Preheat the oven to 325 F and grease and flour a cake pan. Place the butter and sugar in a mixing bowl and beat them together until the mixture is light. Add the eggs and vanilla. Stir in the cake flour. Keep the electric mixer on low or use a wooden spoon to stir the flour in a bit at a time until it's just incorporated. Pour the batter into the pan. Bake the cake for 1 hour 15 minutes.