Two technicians are discussing back pressure. technician a says that higher exhaust-system pressure leads to lower manifold vacuum. technician b says that back pressure can be tested with an oxygen sensor, and egr valve, or an air valve. who is correct?

a. technician a
b. both technicians a and b
c. neither technician a nor b
d. technician b

Read the scenario below and answer the question that follows. bailey is plagued with sleep problems at least a couple of times a week. she often feels tired at work and doesn't do her best work because she is "just so tired." according to the lesson, it can be said that adults have some of the same problems with sleep that bailey does. a. few b. many c. no d. all

What is the meaning of life and everything

What are the countries in south asia?