G A particular brand of diet margarine was analyzed to determine the level of polyunsaturated fatty acid (in percent). A sample of six packages resulted in the following data: 18.7, 19.2, 19.4, 18.8, 18.4, 19.0. (a) Construct a 95% PI for the fatty acid content of a single package of margarine. Round your answers to 2 decimal places. (b) Find a tolerance interval for the fatty acid content that includes 95% of the margarine packages with 99% confidence. Round your answers to 2 decimal places.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.