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



Answer:
78
Step-by-step explanation:
You take the original total: 60, and multiply it by 30 to get 1,800. You then divide 1,800 by 100 to get 18. 18 is your 30%. Now, you add the 30% to 60 getting your total number of ducks: 78.
The equation version:

It is just proportions.
11 chicken and 6 pigs is the answer
2 x 11 + 4 x 6 = 46 legs
11 + 6 = 17 heads