The size of a radioactive sample in grams after t weeks is given by A = 25(0.91)* . (a) How large was the sample originally? grams (b) By what percent is the sample decreasing each week? (C) How long will it take for only 1 gram to remain? Round to the nearest week. weeks

To compute a student's Grade Point Average (GPA) for a term, the student's grades for each course are weighted by the number of credits for the course. Suppose a student had these grades: 3.5 in a 5 credit Math course 2.2 in a 2 credit Music course 2.6 in a 4 credit Chemistry course 3.3 in a 4 credit Journalism course What is the student's GPA for that term? Round to two decimal places. Student's GPA =

a rectangle has a vertical length of 6 and a horizontal length of 8 wyatt it wants to draw a new rectangle with different scales he wants to Vertical it to be 33 1/3 % in and the horizontal length it to be 125% what is the vertical length of the new rectangle. What is the new horizontal length?

The half-life of Radon-222 is 3.8 days. A 34-gram sample of Radon-222 is monitored for one day. How long will it take for the sample to be 15% of the initial amount? (rounded to the nearest hundredths) ​