The level of nitrogen oxides (NOX) in the exhaust of cars of a particular model varies Normally with mean 0.25 grams per mile (g/mi) and standard deviation 0.05 g/mi. Government regulations call for NOX emissions no higher than 0.3 g/mi. A company has 4 cars of this model in its fleet. What is the probability that the average NOX level of these cars is above the 0.3 g/mi limit? Answer to 4 decimal places.

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered