PLEASE HELP!

To hit a ball over a tree a golfer hits the ball with a path that is modeled by h=-16t^2+80t where (h) is the height in meters and (t) is the time in seconds. Determine
Part A: The height of the ball after 1 second

Part B: The time it takes the ball to reach the maximum height

Part C: The Maximum height of the ball

Part D: The time it takes for the ball to return to the ground.

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

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

The scatterplot below shows the number of hours that students read weekly and the number of hours that they spend on chores weekly. which statement about the scatterplot is true?