A ring has a inner circumference of 8 centimeters. What is the radius of the ring? Round your answer to four decimal places. ​

Decide whether the following problem can be solved using precalculus, or whether calculus is required. If the problem can be solved using precalculus, solve it. If the problem seems to require calculus, use a graphical or numerical approach to estimate the solution. ​ A cyclist is riding on a path whose elevation is modeled by the function wherexand are measured in miles. Find the rate of change of elevation when x= 3.

Find the  x- values (if any) at which is not continuous.  ​

Find the  x -values (if any) at which the function   f ( x ) = x 2  – 13 x  – 13 is not continuous. Which of the discontinuities are removable? ​

Find the  x -values (if any) at which the function is not continuous. Which of the discontinuities are removable? ​

Consider the function and the point  on the graph off. Find the slope of the secant line passing through and for . Round your answer to one decimal place. ​

Find the value of c guaranteed by the Intermediate Value Theorem. ​ ​

Find where . ​

List two advantages of FCAW.(4pts)

The neuromuscular junction is a not chemical synapse.