7. each year lizzie's school purchases student agenda books which are sold in the school store this veal the mm purchased 350 books at a cost of if the school would like to make a profit nil to pay for field trips and school activities what is the leas amount they can charge for each agenda hook explain how you found urn answer

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.