1. keisha needs to make at least 28 costumes for the school play. since she can make 4 costumes each week, keisha plans to work on the costumes for at least 7 weeks.

2. if keisha has to have the costumes complete in 10 weeks or fewer, how will our solution change?

for each question, write an inequality. then, graph your solution.

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

Wrote and expression for the difference of p and 4

W-16=-12 solve each one step equation plz