Find the average rate of change and I\m trying to figure out how the answer is 1/2.

1. during first 10 seconds 2. between 10 seconds and 35 seconds 3. during 35 seconds to 40 seconds

An archaeologist in turkey discovers a spear head that contains 53% of its original amount of c-14. find the age of the spear head to the nearest year. (5250 isn’t right)

Find the coordinates for the center for this circle (x+3)^2+(y-5)^2=25