Edelia is planning a crawfish broil party. Each case of crawfish weighs 20 pounds of crawfish. If each pound of crawfish contains 15-25 individual crawfish, approximately how many crawfish can she serve if she buys 5 cases?

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.