HURRY WILL MARK BRAINLIEST AND CASHAPP 20$ IF ONE OF THE ORDERED PAIRS CARTER GRAPHS (4,2) WHICH OTHER ORDERED PAIR DOES HE GRAPH? CHECK ALL THAT APPLY. HURRY.

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left