What is the theory for the evolution of anxiety disorders? a. as a result of an evolutionary cost/benefit analysis of anxiety b. anxiety developed as a reaction to stress c. random mutation caused the evolution of anxiety d. none of the above

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

What happens to an isotope during radioactive decay?