In gallup's annual consumption habits poll, telephone interviews were conducted for a random sample of 1014 adults aged 18 and over. One of the questions was "how many cups of coffee, if any, do you drink on an average day?" the following table shows the results obtained (gallup website, august 6, 2012).

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b

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.

"what factors influence the absorption of sunlight at earth's surface? "