An astronaut drops a rock off the edge of a cliff on the moon.
the distance, d(t), in meters, the rock travels after t seconds can be
modeled by the function d(t) = 0.8t^2. what is the average speed,
in meters per second, of the rock between 5 and 10 seconds after
it was dropped?
(1) 12 (3) 60
(2) 20 (4) 80

What is the area of the trapezoid shown ?

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?