The ratio of Gina's height and the height of her brother Ray is 6:7. If Ray is 154 cm tall, how tall is Gina?​

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

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

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line