In a Chi-Square goodness-of-fit test for the normal distribution, expected frequencies Multiple Choice Are different for every bin. Are equal to the sample size divided by the number of bins used. Are not needed to calculate the test-statistic. Can be calculated by using c-3 degrees of freedom.

1. are the triangles similar and if so why? what is the value of x? show your work.

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =

Use sigma notation to represent the following series for 9 terms.