Question

before computers were widely used, nasa hired human \computers.\ computers performed complex calculations needed to send astronauts into space. katherine g. johnson was one of nasa’s most successful computers. when nasa was preparing to send alan shepard into space, engineers needed to predict the trajectory, or path, his capsule would take. johnson helped by calculating the trajectory. by 1962, nasa had started using electronic computers; these determined the trajectory for john glenn’s friendship 7 mission. the trouble was glenn didn’t trust the machines and wanted johnson to do the job. johnson redid the calculations and made sure they were correct. by 1969, nasa faced its biggest challenge yet: the apollo 11 moon landing. once again, johnson responded by performing the calculations needed to match up the timing of the lunar lander with the command module.
match the problems with their solutions.
problem
nasa wanted to know where alan shepard’s capsule would land.
john glenn didn’t trust computers.
apollo 11 needed to touch down on the moon.
solution
johnson double - checked the trajectory.
johnson figured out the trajectory.
johnson helped match up the lander and the command unit.

Explanation:

To solve the problem - solution matching:

1. For "NASA wanted to know where Alan Shepard’s capsule would land", the relevant solution is "Johnson helped match up the lander and the command unit" as matching the lander and command unit relates to determining the landing location.
2. For "John Glenn didn’t trust computers", the solution is "Johnson double - checked the trajectory" because double - checking the trajectory would address Glenn's trust issue with computers by verifying the calculations.
3. For "Apollo 11 needed to touch down on the moon", the solution is "Johnson figured out the trajectory" as figuring out the trajectory is crucial for a successful moon landing.

Answer:

• Problem: NASA wanted to know where Alan Shepard’s capsule would land; Solution: Johnson helped match up the lander and the command unit.
• Problem: John Glenn didn’t trust computers; Solution: Johnson double - checked the trajectory.
• Problem: Apollo 11 needed to touch down on the moon; Solution: Johnson figured out the trajectory.