TASK DEFINITION: Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
PROBLEM: Problem: i flew my tiny seaplane to visit my mother. on the flight up, i flew at 96 mph. on the way home, i flew 88 mph. what was my average speed for the trip ?
Options: a. 198 mph, b. 110 mph, c. 92 mph, d. 100 mph, e. 99 mph

SOLUTION: c

PROBLEM: Problem: cost is expressed by the formula tb ^ 4. if b is doubled, the new cost w is what percent of the original cost ?
Options: a. w = 200, b. w = 600, c. w = 800, d. w = 1600, e. w = 50

SOLUTION: d

PROBLEM: Problem: the speed of a boat in still water in 42 km / hr and the rate of current is 4 km / hr. the distance travelled downstream in 44 minutes is :
Options: a. 86.6 km, b. 46.6 km, c. 33.7 km, d. 35.6 km, e. 26.6 km

SOLUTION:
c