The weather forecast for today shows that there is a 35% chance that it will rain and a 10% chance that it will rain and the daily high temperature will be between 650F and 70°F. If these two events, a chance of rain and
the daily high temperature being between 65°F and 70°F, are independent, what is the probability that the
daily high temperature will be between 650F and 700F?

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

David bought a poster for an art project. the poster is 2.7 feet wide and 3.9 feet tall. what is the area of the poster?

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