If I had two 100% (one 10/10) and one 5/5 (both process grades) Then would I still have an A if I had an 85 as the only product grade? What would my grade be? Thank you, this would come as assistance if I get one question wrong on an assignment so that I could know if I need to study that question or not before submitting it. PLEASE ANSWER ME BEFORE MONDAY PLEASE!!!

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.