On the first day of the year, alicia has $1000 in her savings account and started spending $25 a week. her sister kelsey had $650 in her savings account and started saving $15 a week. after how many weeks will the sisters have to same amount?

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

41/17 as a decimal rounded to the nearest hundredth

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?