What is the volume of a cube which an edge length of 5 units? what is the volume of a cube with an edge of length of 2.5 units?

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

Through non-collinear points there is exactly one plane.

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?