There are 6 green, 4 pink, and 6 brown marbles in a hat. You pick 4 marbles from the hat. Marbles are returned after they have been drawn. Find the probability that the first marble is brown, the second marble is not brown, the third marble is pink, and the fourth marble is not brown. Give your answer as a decimal to the nearest thousandth.

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year the population of her town is changing by a constant rate

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?