A snake is speeding up from rest to 8 mph to chase a meal what is the change in velocity

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

The radioactive isotope of lead, pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. if 1 gram of this isotope is present initially, how long will it take for 80% of the lead to decay? (round your answer to two decimal places.)