Two radar stations 5.5 miles apart are tracking an airplane. The straight line distance
1 answer:
Answer:
19°
Step-by-step explanation:
I have attached an image showing this elevation.
From the image, let's first find the angle A by using cosine rule.
Thus;
8.1² = 5.5² + 13.1² - 2(5.5 × 13.1)cos A
65.61 = 30.25 + 171.61 - 144.1cos A
144.1cos A = 171.61 + 30.25 - 65.61
144.1cosA = 136.25
cosA = 136.25/144.1
cosA = 0.9455
A = cos^(-1) 0.9455
A = 19°
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Step-by-step explanation:
<h2>The probability that Annie has selected the cards numbered 1, 2, and 3 is 
</h2>
Step-by-step explanation:
Here, the total number of cards in the set = 10
The cards are numbered as 1,2,3,4,5,...., 10
P(Any event E) =
P(picking a card with number 1) =
Now when the first card is picked, the number of cards left = 10 - 1 = 9
P(picking a card with number 2) =
Similarly, P(picking a card with number 3) =
So, the total probability that she has selected card with number 1, 2 and 3
=
Hence, the probability that she has selected the cards numbered 1, 2, and 3 is