Christopher is stringing lights on trees for an event. Each tree needs a minimum of 850 lights. The current tree he is stringing only has 250 lights on it . If each light set contains 30 lights ,what is the Minimum number of light sets needed to finish decorating this tree ?

Multiplying an even number of negative numbers gives an answer that is choose from:

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

100 points? me its important ‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️