Which of the following is the equation for the graph shown? graph of an ellipse on a coordinate plane going through 12 comma 0, negative 12 comma zero, approximately 0 comma 10, and approximately 0 comma negative 10 with points inside ellipse at negative 7 comma 0 and 7 comma 0, and lines x equals 144 sevenths and x equals negative 144 sevenths

x squared over 144 plus y squared over 95 equals 1
x squared over 144 minus y squared over 95 equals 1
x squared over 95 plus y squared over 144 equals 1
x squared over 95 minus y squared over 144 equals 1

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.