Khalif is cleaning his room and kicks a hat off the floor to the top of a bookshelf. If he is standing 5 feet from the shelf and he kicks the hat 18 feet, how tall is the shelf? Round to the nearest tenth if necessary.

The weights of players in a basketball league are distributed normally. the distance (d) of each player's weight (w) from the mean of 86 kilograms was computed as follows: d = |w - 86| if d is greater than 7 for approximately 5% of the players, what is the approximate standard deviation of the players' weights? a. 1.75 kilograms b. 3.5 kilograms c. 4.3 kilograms d. 7 kilograms

Find two numbers if their sum is 91 and the ratio is 6: 7?

Andy has $310 in his account. each week, w, he withdraws $30 for his expenses. which expression could be used if he wanted to find out how much money he had left after 8 weeks?