18x+24+32+12x
56+18x+12x
56+30x

First, find the number of females in the class. 
Then, just write the ratio. 
Answer:
9 = X -1 X = 10
Step-by-step explanation:
Add one to both sides
Answer:
1579
Step-by-step explanation:
There is a particular formula you must use and it leads to this 420(1 + 0.18)^8=1579
Answer:
Horizontal distance between lifeguard and the person is 22 feet.
Step-by-step explanation:
Given: A lifeguard sees a person in distress.The eye level of the lifeguard is 15 feet above the ground. Angle of depression is 34°.
To find: Horizontal distance between lifeguard and the person.
Solution : If we draw a triangle then tan∅ = 
Here base is the horizontal distance.
Now we put the values in the formula.
tan 34° = 
Or Base = 
= 
So the answer is 22 feet.