A dump truck weighs 11.25 tons when empty. A conveyor belt pours sand into the truck at a constant rate of 14 ton per minute until it is full. Let t represent the elapsed time in minutes. Let w represent the weight of the truck after t minutes. Write an equation for w in terms of t. Enter your equation in the space below. Enter only your equation.

How to determine whether two known pairs of points are on the same line.

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

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