Please give more clear explanation for this question so I can help you.
Answer:
56
Step-by-step explanation:
By tracing the lines on the tree diagram, we see the probability of both being red is 0.5 × 0.6 = 0.3.
The probability of both being blue is 0.5 × 0.4 = 0.2.
So we would expect to get both blue 2/3 of the times we get both red.
X = 2/3 (84)
X = 56
Answer:

Step-by-step explanation:
Let
x-----> the angle of depression
we know that
The sine of angle x is equal to divide the altitude (opposite side to angle x) by the distance from the runway (hypotenuse)

