4) A radioactive material decays at a rate of 40% per hour. a) If we start with 80 grams of the substance, can you find a fomula that models this rate
of decay?
b) How much will be remaining at the end of 6 hours?
Pls help show work

Rectangle bcde is similar to rectangle vwxy. what is the length of side vy? a) 1 7 b) 2 7 c) 3 7 d) 4 7

Which number line correctly shows 0.8 + 0.3?

Question 9 of 10 2 points suppose your sat score is 1770. you look up the average sat scores for students admitted to your preferred colleges and find the list of scores below. based on your sat score of 1770, which average score below represents the college that would be your best option? o a. 1790 o b. 2130 o c. 2210 od. 1350