I don't know what to do anymore

Kuhl found that babys brains are most open to learning the consonants in their native language at what age? and vowels at what age?

Apopulation of bolts has a mean thickness of 20 millimeters, with a population standard deviation of .01 millimeters. give, in millimeters, a minimum and a maximum thickness that includes 68% of the population of bolts.

The tendency to seek out individuals who represent the same level of physical attractiveness as ourselves is explained as