Which of the following lists of ordered pairs is a function? A. (1,1),(2,3)(1,5),(4,7)
B. (2,4),(-2,4), (3,9), (-2,-4)
C. (2,4), (3,9),(4,16), (5,25)
D. (0,2), (4,2), (0, -4), (4.-2)

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

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

During your cycling trip, you and your friends often stayed in hostels. the prices of these are listed below. hostel standard room (price per night) with breakfast (price per night) super sleep hostels £22.45 £28.65 normandy nights £18.55 £25 zzzola hostels £24.50 £30.99 belgian beds £11.20 £18.55 night-time rest days ? £33 what is the range in cost for a single night, including both standard room prices and with breakfast prices?