If X is normal with mean 9 and variance o2 where P ( X > 7.5 ) = 0.7734 Then standard deviation of X is?​

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

During each minute of a comedy show, carlin laughs 55 times. carlin watches 33 comedy shows every day, and each show is 40 minutes long. how many times does carlin laugh every day due to the comedy shows?

Explain how you can show five less than a number using algebraic expression