The speed of a moving sidewalk at an airport is 7 ft/sec. A person can walk 74 ft forward on the moving sidewalk in the same time it takes to walk 15 ft on a non moving sidewalk in the opposite direction. At what rate would a person walk on a non moving sidewalk

10.56 ft/s.

Explanation:

given,

Speed of side walk = 7 ft/s

time taken to travel 74 ft on the moving sidewalk = time taken to walk 15 ft on non moving side walk.

We know,

Rate at which person walk on non moving side walk is equal to 10.56 ft/s.

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.