Study the diagram of circle A, where BC⎯⎯⎯⎯⎯⎯⎯⎯ is tangent to circle A at point C. Also, BC=3, BA=5, and AC⎯⎯⎯⎯⎯⎯⎯⎯ is a radius.
What is the length of the radius, r?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers