To thank her five volunteers, Mai gave each of them the same number of stickers. Then she gave them each
two more stickers. Altogether, she gave them a total of
30 stickers.

Me because some of question i don’t understand

Regular price 75$ discount 25%sale price?

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.