Somebody me with this question for 10

janine memorized 360 vocabulary words during the school year. each week during the summer, janine remembered 3% fewer words than the week before.
which type of function would best represent the number of vocabulary words janine remembered during the summer?

a. linear

b. quadratic

c. exponential growth

d. exponential decay

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.