Tom has a faulty light switch. If he calls an electrician to come and fix it, the electrician will charge him $65 for the house call plus $60 per hour for parts and labor. Tom wants to spend no
more than $100 to repair the switch. The electrician estimates it will take her half an hour to fix
the switch. Should Tom hire her?

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

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.

Graph the system of equations. {6x−4y=−244x−8y=−32 use the line tool to graph the lines.