Answer: A. The Germans often sent important messages concerning their war efforts to their ambassador in Washington, D.C.
Explanation: Readers who make inferences use the clues in the text along with their own experiences to help them figure out what is not directly said. Inference also involves using what you know to make a guess about what you know or reading between the lines.
Answer:
Total time of flight is 18 s.
Explanation:
The projected stone is a projectile, so that the time required is the total time of flight (T).
T = 
where: U is the velocity of the stone (90 m/s), A is the angle of projection, and g is the gravitational acceleration (10 m/
).
Then,
T = 
= 
= 18
T = 18 s
The time taken for the stone to travel up and back to the ground is 18 seconds.