Three-digit phone prefixes that represent an area code can be created from the digits 0 through 9. How many three-digit phone prefixes (area-code) are possible that do not start with 0 or 1, but contain either 0 or 1 as the middle digit?

Three-digit phone prefixes that represent an area code can be created from the digits 0 through 9. How many three-digit phone prefixes (area-code)are possible that do not start with 0, but contain 0 as the middle digit?

a) Find parametric equations of an ellipse centered at the origin with major axis of length 6 on the x-axis and minor axis of length 4 on the y-axis, generated counterclockwise on the interval

Consider the follow series:   and answer the following questions.   a) Use the Ratio Test to determine the condition of absolute convergence. Please clearly show all your work.   b)  Find the radius of convergence.   c)  Find the interval of convergence, i.e., when necessary check the endpoints for convergence.

Multi-part problem for the conic section  .  First write the equation in working form and find the following, as appropriate.   a) Center   b) Foci   c) Vertices on the major axis   d) Sketch the graph  

Consider the follow series: 

Find the exact surface area of the resulting surface

Find the exact length of the curve 

Consider the integral  

Provide 1 policy statement that you would expect to appear in company’s email policy.