The answer is 60 students.
80%=.8
48/.8=60
The events 'select a plain pencil' and 'select a color pencil' are independent. therefore the probability of both occurring is the product of their probabilities:
The answer is 3/20 or 0.15.
Answer:
here is the answer
Step-by-step explanation:
Answer:
Below.
Step-by-step explanation:
Part A.
m < RPB = 180 - 115 = 65 degrees.
So the m < x = 180 - 65 - 62
= 53 degrees.
Part B.
First line of Part A:
M < RPB + m < PRD = 180 degrees ( Internal angle between 2 parallel lines are equal).
Second line:
The 3 angles x, 62 and 65 degrees are all on the same straight line (AB), so they sum to 180 degrees.
If the first bird is on top of the bird watcher and the height of the tree is the same, then we form a right triangle with right angle on the second bird.
We can solve the angle of depression by trigonometric functions. So,sin θ = 29.7 / 42.1θ = sin-1 (29.7/42.1)θ = 44.87°
Therefore, the angle of depression of the second bird and the bird watcher is 44.87°.