Johnny is training to run a half-marathon. His training program recommends that he run for 5 minutes and walk for 1 minute. What is the constant of proportionality and what does it mean? Also How long can Johnny run if he walks for 35 minutes?

Determine whether the following statements are true and give an explanation or counterexample. bold a. when using the shell method, the axis of the cylindrical shells is parallel to the axis of revolution. bold b. if a region is revolved about the y-axis, then the shell method must be used. bold c. if a region is revolved about the x-axis, then in principle it is possible to use the disk/washer method and integrate with respect to x or the shell method and integrate with respect to y.

What are the soultion(s) to the quadratic equation 40- x^2=0

What is the difference between the equations of a vertical and a horizontal line?