Solve the problem.Suppose that the amount in grams of a radioactive substance present at time t (in years) is given by A(t) = 870e-0.60t. Find the rate of change of the quantity present at the time when t = 2.
A. -3.3 grams per year
B. 3.3 grams per year
C. -157.2 grams per year
D. 157.2 grams per year
Answer: C
Mathematics
You might also like to view...
Find the area of the specified region.Inside the circle r = 6 cos ? + 3 sin ?
A. 
B. 9?
C. 
D. 
+ 9
Mathematics
Add the numbers using the number line.2 + (-6) 
A. 8 B. -8 C. 4 D. -4
Mathematics
Solve the application problem.A certain rectangle's length is 5 feet longer than its width. If the area of the rectangle is 66 square feet, find its dimensions.
A. 5 ft by 10 ft B. 5 ft by 12 ft C. 7 ft by 12 ft D. 6 ft by 11 ft
Mathematics
Convert to decimal notation.- 
A. -2.
B. -8.
C. -0.
D. -0.9
Mathematics