An automobile trip started at 8:35 A. M. and was completed at 2:15 P. M. on the same day. How long did the trip take? (A) 4 hrs. 20 min.
(B) 4 hrs. 40 min.
(C) 6 hrs. 20 min.
(D) 5 hrs. 40 min.
(E) 5 hrs. 20 min.

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

What is the ratio of the length of an object in yards to the length of the same object in miles?