Correct answer only a cleaning company charges x dollars per hour to clean floors and y dollars per hour to clean the rest of a house. • when the company spends 2 hours to clean floors and 3 hours to clean the rest of a house, the total charge is $80. • when the company spends 1 hour to clean floors and 4 hours to clean the rest of a house, the total charge is $100. which ordered pair represents the hourly charges to clean floors and to clean the rest of the house? a) (2, 12) b) (4, 24) c) (12, 2) d) (24, 4)

Jordan rides his bike 6 7/15 miles every day to deliver newspapers and to go to and from school. if his ride to and from school is 4 3/10 miles, how many miles is the trip to deliver newspapers? 1 1/3 1 1/6 2 1/6 2 4/5

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

Is this a polynomial function? i need to know asap