Want to get to the top? Keep trying! During a 980 miles cruise, a ship travelled 590 miles in 7 hours
first. Then the ship changed its speed for the rest of the trip. If
13 hours were spent on the whole cruise, what was the speed
for the rest of the trip?

When can a theory be modified if a new type of technology allows for new observations that raise new questions? a-immediately, while the questions about the theory are being asked b-after new hypotheses related to the theory are tested in experiments c-only after the new observations disprove all parts of the theory d-while scientists begin to think about how the theory could improve