The atmosphere provides us protection from the sun's rays. in addition, it also makes which of the following possible?

the atmosphere gives us gravity.
the atmosphere gives us air to breathe.
the atmosphere makes the earth rotate on its axis.
the atmosphere makes flying possible

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

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).

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?