The scores for the evaluation of a new skateboard are Normally distributed with a mean of 500 and a standard deviation of 100. There were 20,000 skateboards tested. Use the z-table to answer the question.

What percent of skateboards scored a 700 or higher on this evaluation?

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 all solutions for 2y - 4x =2 y = 2x + 1 site: socratic.org

Need asap. solve for the following inequality