Four identical 2500 kg objects are at the corners of a square with 12 m sides what is the distance between a and d

Please see attached diagram

We have square ABCD

Since ABCD is a square, all lines are of equal length

Therefore, lines AB, BC, CD and AD are 12m in length

If we draw a line from A to D, ACD forms a right angled triangle

The line AD is the hypotenuse of the right angled triangle ACD

Therefore, AC^2 + CD^2 = AD^2 (Pythagoras theorem)

AD^2 = 12^2 + 12^2

AD^2 = 144 + 144

AD^2 = 288

AD = 16.97

Therefore, the distance between A and D is 16.97m

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.

the answer is b i think