Jane has 1 quarter, 3 dimes, and 4 nickels. What percent of dollar does Jane have? i know the answer is 44% but can someone please explain how i got 44%??

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.