Answer:

Step-by-step explanation:
From the question we are told that:
Angle 
Height of plane 
Generally the trigonometric equation for distance flown d is mathematically given by

Therefore



Irrational because square root of 15 is irrational
The answer is 423 since it's the closest number to 400 from all the numbers listed above.
The numbers 351 and 445 would also round to 400 but they are not the closest ones.
Hope it helped,
BioTeacher101
Answer:
Da!!!!!!!!!!!!!!!!!!!!!!!!!!
YES
So Angle GEN and FED are vertical angles, which means that their angles are congruent. Therefore, Angle FED is 60°
Angle GEN and DEN are a linear pair, which means that they are supplementary angles (add up to 180). To find Angle DEN, we have to form the equation: 60 + DEN = 180
For this, all you have to do is subtract 60 on both sides, and your answer will be: DEN = 120°