Answer:
Relative frequency:

The most serious threat to aviation safety is, according to this data, "mechanical failures". It can be improved by more rigorous inspection and better maintenance policies and execution.
Step-by-step explanation:
We have the data for fatal plane crashes. The sum of plane crashes is
We can calculate the relative frequency as:

We can see that the most frequent cause is "mechanical problems", with a relative frequency of 0.45.
Answer:
9.5 cm
Step-by-step explanation:
B ratio of angles ratio are 1:2:3
30-60-90 triangle (angles )
x-x√3 -2x triangle ( sides)
short side -long side- hypothenuse
2x = 19 so x= 19/2 = 9.5 cm
Answer: 17
Step-by-step explanation:
Answer:
See below.
Step-by-step explanation:
A. k = 50 * 3.6 = 180.
B. The equation is y = 180/x.
C. When x = 75, y = 180/75
= 2.4.
D. Checking C: 2.4 = 180/75 = 2.4. Correct
Between 0.3 and 0.5 you can have numbers such as: 0.4 and 0.45, etc.
0.4 in a fraction form is 4/10 = 2/5 and 0.45 in a fraction form is 45/100 = 9/20.
Also could use numbers like 0.35, 0.38, 0.42 ....