The average Act score follows a normal distribution, with a mean of 21.1 and a standard deviation of 5.1. What is the probability that the mean IQ score of 50 randomly selected people will be more than 23

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

What are the first 4 terms in the multiplication pattern given by the formula 2×4n

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)