Neil is on a scuba diving expedition. The graph shows Neil’s approximate elevation as he jumps off the dive boat. The variable E is his elevation in feet with respect to the water level, and t is the time in seconds. Which equation best models the given graph?

A.
E = -7t + 28
B.
E = -7t2 + 15t + 28
C.
E = -7t2 + 15
D.
E = 7t2 + 15t − 22

The length of each stair is 11 inches. what is the rise, r, for each stair? round to the nearest inch. 2 inches 7 inches 17 inches 24 inches

Which formula finds the probability that a point on the grid below will be in the blue area? p(blue) = total number of squares number of blue squares number of blue squares p(blue) = total number of squares number of blue squares p(blue) = number of white squares

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.