A circle has a radius that is increasing at a rate of 13/π feet per hour. What is the rate of change of the area of the circle when the radius is 7 feet?

How many different triangles can be constructed with the angle measurements of 134° 10° and 36° ?

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

Find dy/dx using implicit differentiation ln(20+e^xy)=y