Please help with both questions thank you!

What is the rapid growth rate of a population after a period of slow growth called? a. exponential growth b. overconsumption c. a point source d. the carrying capacity

What opposes motion between surfaces that are touching

The boom oa carries a load p and is supported by two cables as shown. knowing that the tension in cable ab is 183 lb and that the resultant of the load p and of the forces exerted at a by the two cables must be directed along oa, determine the tension in cable ac.