Matt earned $800 helping his grandfather at his business. If spent 1/5 of his earnings on a gift for his mom, how much money did he have left over? Plz I need help answering this plz no link

Use the normal approximation to the binomial distribution to answer this question. fifteen percent of all students at a large university are absent on mondays. if a random sample of 12 names is called on a monday, what is the probability that four students are absent?

Is the power produced directly proportional to the wind speed, give reasons for your answer?

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample