The college you will attend in the fall requires that all incoming freshman take a college entrance exam for mathematics, Everyone who scores in the lower 28% must enroll in a remedial math class. Assume the variable is normally distributed,
where the exam has a mean of 60 and its standard deviation is 7. What are the corresponding z value(s) and the cut off score?

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.