Carbon monoxide (CO) emissions for a certain kind of car vary with mean 2.881 g/mi and standard deviation 0.6 g/mi. A company has 60 of these cars in its fleet. Let y overbar represent the mean CO level for the company's fleet. a) What's the approximate model for the distribution of y overbar? Explain. b) Estimate the probability that y overbar is between 3 and 3.2 g/mi. c) There is only a 10% chance that the fleet's mean CO level is greater than what value?

b is the correct

the role of the microscope world in creating new materials .

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

it is b that is the answer.