choose all values that are needed to determine which painting method is cheaper using primer and paint or using special paint

Which of the following is true for the relation f(x)=2x^2+1

4. a single woman uses an online cash flow calculator which reveals a cash flow of 203. what does this mean?

Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?