determine whether or not f is a conservative vector field. if it is, find a function f such that f = ∇f. (if the vector field is not conservative, enter dne.) f(x, y) = ex cos(y)i + ex sin(y)j

The authors use the word “backbone” in lines 3 and 39 to indicate that

Which statements are true for invasive species? 1. they always stabilize an ecosystem. 2. they’re always successful in adjusting to a new habitat. 3. they often compete with the native species for resources. 4. they have the ability to displace the native species. 5. they’re always pests.

One osha preferred method to control absestos dust during brake and cluth repair and service is the negative pressure enclosure/hepa vaccum system method