An urn contains 10 marbles: 4 red, 3 white, 2 blue, and 1 orange. (4 points) (a) what is the probability of drawing a marble that is red or white? (b) what is the probability of drawing a marble that is neither red nor white? (c) what is the probability of drawing a pair of marbles, one red and one white at the same time? (d) what is the probability of drawing a pair of marbles, one blue and one orange at the same time?

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

Rewrite so the subject can be y in the formula d=m-y/y+n

Julie was able to walk 16 km through the zoo in 6 hours. how long will it take her to walk 24 km through the zoo?