The following graph shows the height of an object after it is thrown from the ground. how
long is the object in the air?
height (feet)
time (sec)
a. 14 seconds
b. 15 seconds
c. 12 seconds
d. 7 seconds
dail

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.

What are the coordinates of the point is 1/4 of the way from a (-6, -3) to b (6, 1)? a. (-3, -2) b. (0, -2) c. (-1, 0) d. (3, 2)

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.