*psychology* what is common in all cultures about children learning to speak? children's first sounds are similar in all cultures. children first learn to use their hands to ask for words. children feel obligated to learn the word for "mother" first of all. children listen intently to not repeat grammatical mistakes.

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?

Grant simplified the expression 1.5(-3.2 + 2.5) his work is shown below explain the error in grants work

Among the most famous of all meteor showers are the perseids, which occur each year in early august. in some areas the frequency of visible perseids can be as high as 40 per hour. given that such sightings are poisson events, calculate the probability that an observer who has just seen a meteor will have to wait at least five minutes before seeing another.